I need help w this

[inland ether]

How do I do this

[stuck smelt]

can we type our question here or like

go to help and wait for an open channel

yoha

[inland ether]

Idek

What am I doing

SOMEONE HELP PLS

[stuck smelt]

ok so basically

our like teacher showed us something else and this isnt it and we tried to do it but it like doesnt make sense

[inland ether]

Yes

[keen oriole]

,rccw

[keen oriole]

so where exactly are you stuck? what did your teacher show?

[stuck smelt]

we are stuck on like the first part of the probelm if that makes sense

[keen oriole]

on which question number? and what do you mean by "first part of the problem"?
(also, I don't think you should send random GIFs into a help post...)

[stuck smelt]

oh sorry

[inland ether]

Okay so

[stuck smelt]

okay im stuck on the second one

[keen oriole]

question 2, alright.
can you show what you've tried?

[stuck smelt]

and like the first step because the teacher said for example before it could be 2x=y or something but now its like x=y and it doesnt make sense to me

[keen oriole]

what does not make sense to you? how are you taught to substitute?

[stuck smelt]

thats basically it

[keen oriole]

a quick reminder that just because the variables have changed around, doesn't mean you can't reuse the same concepts for them.

[keen oriole]

and this is correct, but I would call the new equation eq. 3 rather than 2.

[stuck smelt]

like solving rhe problem that has a variable alone in it and substitute it on the second one idk

[keen oriole]

now solve that new equation for y.

[inland ether]

I’m stuck on the question 2, 3 and 5 bc on the number 2 it says y= 2y - 2 but the teacher said that in that part we have to substract to like the numbers that are on the both sides of the ecuation but there’s only y on the other side

[keen oriole]

that would make sense.

[inland ether]

idk if u can understand

cuz I don’t know how to write English properly

I’m sorry

[stuck smelt]

ummmm

[keen oriole]

I'm not sure what your teacher meant, but what you need to do here is to make the equation into y = {something}, without any y on the other side.

[stuck smelt]

can i show you the original like equations she explained and the one she gave us now

if thats easier

[keen oriole]

any context is worth it.

[stuck smelt]

okay wait

this is what we were taught

[inland ether]

Exactly

[stuck smelt]

this is what she gave us out of nowhere

[inland ether]

We weren’t taught things like y= 2y - 2

And all exercises are like that

[keen oriole]

it's the same situation right here.

plus, at this point, have you learnt about solving an equation for a variable?

like, if I gave you 2x + 5 = x + 1, can you solve this for x? (yes/no, you don't have to actually solve it.)

[stuck smelt]

ok wait

i dont think so

[keen oriole]

oh dear...

alright, if I tell you to move all terms with x to one side, would you understand what I'm telling you to do?

for example, given 2x + 5 = x + 1, if I told you to move all terms with x to the left, can you do that? (yes/no.)

if not, you may need to understand this concept first. (don't memorize examples!)

[stuck smelt]

i think so

[keen oriole]

alright. using my example, move all terms with x to the left, and move all numbers to the right.
show me the final result.

[stuck smelt]

move all terms with x to the left

x= 2x+5+1

???

ikd

[keen oriole]

the 2x was originally on the left, it should not be on the right now.

[stuck smelt]

RIGHT

[inland ether]

x= 1+x+ 2X

Wait

No

I wrote it wrong

Sorry

BUT I KNOW

[stuck smelt]

x+2x=5+1

???

HRLP

[keen oriole]

correct concept, wrong signs.

[inland ether]

Wait give me one last change

Chance

Okay so

[stuck smelt]

wrong signs?

[keen oriole]

yes.

I'll explain what I mean when yoha is done.

[stuck smelt]

ok sorry

[inland ether]

x= -1 -x -5 - 2x?

[keen oriole]

incorrect.

[inland ether]

oh

[stuck smelt]

but like the x is on the right

when they said put it to the left

[keen oriole]

so let's recap.

[stuck smelt]

okay

[keen oriole]

we had 2x + 5 = x + 1. we want all terms with x on the left.

now, 2x is already on the left, so no need to touch it. but x is on the right, so we need to move it.

[stuck smelt]

2x + x = 5+ 1?

[keen oriole]

wrong sign again.

[stuck smelt]

oh my gosh

is it -

[keen oriole]

since that x is positive, we must subtract x from the right, so that we have x - x = 0 on the right.
but by doing that, we also have to subtract x from the left to keep the two sides of the equation, well, equal.

[stuck smelt]

oh

[keen oriole]

so, \
$2x + 5 = x + 1$ \
$2x + 5 - x = \cancel{x - x} + 1$ \
$2x - x + 5 = 1$ \
$x + 5 = 1$

[green saddle]

Nicole

[keen oriole]

we can do the same thing to move the +5 to the right, subtracting 5 on both sides to get x = -4.

[stuck smelt]

OHHHH

wait

okay

what does the x like canceled out

mean rn

[keen oriole]

x - x = 0, so is there any more need to keep writing it?

[stuck smelt]

ohh okay

[inland ether]

okay so I need help w these two

I’m gonna send u what I have

I think it’s wrong idk

[stuck smelt]

wait im starting to get it

[inland ether]

3 and 5

[keen oriole]

,rccw

[stuck smelt]

question

when you substitute the 2y where the x goes, do you put the 2y by itself or does the x go somewhere

[keen oriole]

if y + x = 460 (for example) and x = 2y, then just put the 2y where the x was.
you'd get y + 2y = 460 in this case.

[stuck smelt]

okay thank you

cause i was confused on that too

[keen oriole]

-> x + (15 + x) = -15
up to this line you are correct. I don't know where the 15x came from though.

(for question 3.)

[stuck smelt]

the 15x came from the first part

right

[keen oriole]

for question 5, it is more advisable to arrange the first equation for x instead of for y.

[inland ether]

The teacher told us that to distribute if we multiply 5x 15 it’s 15x

[keen oriole]

but there isn't any multiplication here.

[inland ether]

Uhm

[keen oriole]

you have x + (15 + x).

you don't have x(15 + x).

[inland ether]

Oh right

So what do i do?

[keen oriole]

x + (15 + x) is the same as x + 15 + x. you can then proceed.

[stuck smelt]

wait so what am i supposed to do now (when ur done with yoha)

[keen oriole]

move all terms with y to the left.

[stuck smelt]

to the left

okay

so

2y + y = -2??

[keen oriole]

wrong sign for 2y.

[stuck smelt]

okay

[keen oriole]

that 2y on the right was positive. you'd have to subtract 2y from both sides.

[stuck smelt]

OHHHH

wait

okay

[inland ether]

Wait how many is 15x + x

I can sumar that??

[keen oriole]

you do not have 15x in the first place.

[inland ether]

wait

I’m sorry

[keen oriole]

you have x + 15 + x.

[inland ether]

I wrote it incorrectly

I meant 15 + x

[keen oriole]

15 and x cannot be summed.

[inland ether]

okay

[keen oriole]

sum the two x's instead.

[stuck smelt]

i think im doing smth wrong

[keen oriole]

that's the right idea. what would you get?

[inland ether]

and how many is x + x?..

[stuck smelt]

well y-2y

[keen oriole]

full equation being?

[keen oriole]

what's 1+1, no joke?

[inland ether]

okay

[stuck smelt]

ummmm

2y

???

[keen oriole]

when someone asks you for an equation, it's probably worth considering that you may be missing something if you don't have an equals sign.

plus, y - 2y is not 2y.

[stuck smelt]

sigh

[keen oriole]

(if that was what you meant.)

[stuck smelt]

but y = 1 right? cause its the variable only

so

[keen oriole]

y is not 1 here.

[stuck smelt]

okay

so how do i y-2y

[keen oriole]

well, y is more accurately 1y. so you have 1y - 2y.
what's 1 - 2?

[stuck smelt]

-1?

[keen oriole]

exactly so.

you'd then end up with -1y, which is just -y.

[stuck smelt]

okay

[inland ether]

so I’m sorry for interrupting but now I have 2x(15) = 15, If that’s wrong idk what I’m doing

[keen oriole]

that is slightly incorrect.

[inland ether]

oh

[keen oriole]

this implies you have 2x times 15. you don't have that - you have 2x plus 15.

[stuck smelt]

idk why im dividing

[keen oriole]

you're not dividing by -y here. dividing is the correct idea though!

you are dividing by -1, because you want y alone on the left.

[stuck smelt]

do i divide by -1?

oh yay

[keen oriole]

correct.

[inland ether]

So it would be 2x + 15 = -15

?

[keen oriole]

correct.

[inland ether]

Ty

[stuck smelt]

is this correct

[inland ether]

now I have 2x = 30

[stuck smelt]

u divide right?

idk

[inland ether]

That’s what I’m doing idk tho

[keen oriole]

yes.

[stuck smelt]

IH MY GOSH

I DIDNIT

😭😭😭

[keen oriole]

wrong sign on the 30.

[inland ether]

Wait I have it negative I js wrote it wrong

[keen oriole]

be very careful with those signs!!

[keen oriole]

your x has the wrong sign still.

[inland ether]

Uhm

Why is it negative tho

[keen oriole]

you had 2x = -30.

and you are dividing by 2.

there's nothing here to change the sign of the -30.

[inland ether]

oh

So uhm

[stuck smelt]

is the ecuation over or is there smth else

[inland ether]

-15?..

[keen oriole]

x is indeed -15 for yoha.

[inland ether]

Ty

[keen oriole]

well, you found y. what's x?

[stuck smelt]

um

WIAT

how do i get x

[inland ether]

wait so y= 0?

[keen oriole]

substitute what you got for y into either of the two original equations, then solve for x.

[stuck smelt]

okay

wait

[keen oriole]

correct.

[inland ether]

Yay

[keen oriole]

actually question 3 is quite obvious if you look at it.

let me show you an insight for that question alone.

[stuck smelt]

x=4?

[keen oriole]

you have
x + y = -15
x - y = -15

notice that if you add y to x, you get the same thing as if you subtract y from x.

that should clue you into the fact that y = 0.
then x would be whatever is on the right.

the insight here is that y seems to be doing nothing to the value of x. the only number that does this via addition and subtraction is 0.

but for your purposes, don't skip the steps. keep doing what you're currently doing.

[inland ether]

Ohhhh thanks

[keen oriole]

correct.

[stuck smelt]

YES

THANK YOU

[keen oriole]

I presume the two of you are done?

[stuck smelt]

i understood

[keen oriole]

if you guys are done, then you may mark this post as solved (but only the original poster can do so).

[stuck smelt]

okay

[inland ether]

Wait no

[stuck smelt]

LMAOO

[inland ether]

I’m sorry but now I’m on num 5

What do I do now

[keen oriole]

hm. you had 2x - 8x from the start. why are you substituting y back into the equation?

or did you miswrite something? show the full steps.

[stuck smelt]

she keeps leaving im crin😭😭

[keen oriole]

,rccw

[keen oriole]

you miscopied something for sure. show the original question 5 please.

[keen oriole]

who, me?

[keen oriole]

in that case, no substitution is necessary here. this question has a typo.

[stuck smelt]

nonono

[inland ether]

Huh

[keen oriole]

the second equation doesn't have a y in it. you can solve it straight away.

[inland ether]

Oh right

[keen oriole]

I presume what they meant was 2x - 8y = 2.

[inland ether]

Ohh

[keen oriole]

but if that is the case, then I have some bad news for you - this system has an infinite number of solutions.

[inland ether]

..

[keen oriole]

assuming that is not the case, however, substitution is not needed.

[stuck smelt]

so.. do i leave it in blank

and ask

[keen oriole]

the second equation can be solved normally.

[stuck smelt]

if its written wrong

[keen oriole]

if I were you, I'd just solve the second equation normally, then substitute the value of x into the first equation and solve for y there.

then hand it in and see what the teacher says.

[inland ether]

it would be -6x = 2?

[keen oriole]

I do not like leaving things blank unless there is a good reason for me to do so.

[keen oriole]

yes.

[keen oriole]

to add though, that's just me. if you want to leave it blank with that justification, feel free to do so as long as you are ready to talk to your teacher about it.

[stuck smelt]

its due thursday, ill leave it blank and ask and do it monday when my question is answered is that a right thing to do

[keen oriole]

that is more of a morals question than a math question. I cannot answer that for you.
do whatever you feel is right.

[stuck smelt]

okay

thanks

[inland ether]

How do I mark this as solved?

[keen oriole]

type .solved or .close.

[inland ether]

.solved