sloving linear equations help

[wanton pond]

help plz 🙂 i need help with question 2

[dry current]

;rotate

; rotate

bruh idk how to rotate

@wanton pond

whats P equal to

[wanton pond]

u don’t need to rotate anything tho

[dry current]

yea its ok

[wanton pond]

p = 2l + 2w

[dry current]

yea but what is the perimeter it gives you

[wanton pond]

thats all it gives me

[dry current]

read the question again

how much fencing

[wanton pond]

300 m

[dry current]

does she have

yea

thats the perimeter

[wanton pond]

oh

[dry current]

lol

[wanton pond]

but i needa figure out the length

and i dunno how to do that

[dry current]

yea so plug in 300 for P

300=2l+2(10)

[wanton pond]

okay

whats next

[dry current]

you know how to solve a linear equation?

[wanton pond]

no

i dont understand anything

[dry current]

you need to isolate l

[wanton pond]

how

[dry current]

get it by itself

ok lets do easier one first

if 2x+1=5 how to find x

[wanton pond]

idk bro

i dont remember anything

[dry current]

if you subtract one from both sides you get 2x+1-1=5-1

so 2x=4

[wanton pond]

ohh ok

[dry current]

do you see that or no

[wanton pond]

yeah

[dry current]

then you can divide each side by 2

2x/2=4/2

x=2

[wanton pond]

oh okay

[dry current]

so you always need to subtract the constant (a number like 33 or 5)

first

then divide by the number in front of the variable x

[wanton pond]

whats a constamt

[dry current]

a constant is any number that always have the same value

3 never changes value

2.1 doesnt

[wanton pond]

im confused

[dry current]

the square root of 4 doesnt

[wanton pond]

how does a number value change

[dry current]

its just a number

like lets say just the letter a

it can be 1 or 5 ot 7 maybe

if we arent given context

[wanton pond]

im confsued

[dry current]

lets say time

time is alaways changing

its not constant

you cant say the time is always 4 pm

[wanton pond]

yeah

[dry current]

because its always changing

so a constant never changes

like the number 1 never changes

[wanton pond]

so how do ik if a number is a constant

[dry current]

well any number without a letter is always a constant

so we have 300=2l+2(10)

[wanton pond]

is 12 a constant

[dry current]

yes

[wanton pond]

how tho

[dry current]

the value of 12 is the same

thats why something like a meal at a restuarnt always would cost 12 from day to day

[wanton pond]

what about 21

[dry current]

yea

any nummber without a letter is always a constant

[wanton pond]

oh

so like 7x would not be a constant then

[dry current]

it is if the equation is like 7x=14 where x has to be 2

[wanton pond]

howww

theres a letter

[dry current]

whats 7 times 2

14

so it has to be 2 there

[wanton pond]

oh ok

but what would i do for the rest of the question

[dry current]

well just dont worry what constant means really

so if we have 300=2l+2(10)

first multiply 2 and 10

[wanton pond]

yeah so that wpild be 20

[dry current]

and rewrite the equation

[wanton pond]

ok

[dry current]

300=2l+20

what to do next

?

[wanton pond]

ummm would we add 21 and 20?

[dry current]

subtract 20 because we want l by itself

so 300-20=2l+20-20

[wanton pond]

oh i forgot its 2l and not 21

[dry current]

280=2l

yea xD

[wanton pond]

lol

[dry current]

you see how i did that ?

if not just ask

[wanton pond]

i think

[dry current]

lets say we have 4=4

subtract 2 from each ide and its still true

4-2=4-2

2=2

which is also true

same thing just with more stuff

[wanton pond]

ohhh ok

thanks

[dry current]

yea ok but if we have 2l=280

what would you to to find l

or what do you know l is from guessing

[wanton pond]

oh i thoiught we finished the question

[dry current]

we need to find l

[wanton pond]

how

[dry current]

it says we nee to find the length

if 2x=4 whats x

?

[wanton pond]

2

[dry current]

so we got that by dividing ecah side by 2

2x divide by 2 is x

and 4 divide by 2 is 2

so x=2

[wanton pond]

okay

[dry current]

same thing for 2l=280

divide by the number in front of l

which is 2

so 2l/2=280/2

[wanton pond]

ohhhh ok

[dry current]

so whats l then

[wanton pond]

is it 140?

[dry current]

YES

[wanton pond]

YAYYYY

[dry current]

good job

[wanton pond]

thank you

[dry current]

if you still confused look up linear equations organic chemistry teacher

np

he teaches and explains well

[wanton pond]

okok thanks u

[dry current]

have. agood day bye

[wanton pond]

bye bye have a good day too

wait i haver anothr question

[dry current]

ok

p is still 300

but now w=6.75

write the equation first

[wanton pond]

how is w 6.75

nvm

wait how would i calculate it

plsssssssssssss

i beg

[dry current]

it says width is 6.75

write the equation then ping me

im helping other ppl too so just ping when back

[wanton pond]

would i write it like that

@dry current

[dry current]

sorry i didnt realize it was a new problem

the peroimeter should be the thing you are solving for

my fault

[wanton pond]

no its ok

[dry current]

its good tho

47 is the answer

[wanton pond]

okok thanks

[dry current]

just erase the left part

and the last equation

[wanton pond]

what left part

[dry current]

the 300

on each

[wanton pond]

ohhh ok

[dry current]

replace it with p

ping me again if more help

[wanton pond]

okok

[wanton pond]

.close