How to solve for Y?

[marsh mist]

I got x but how do I solve for Y??

[vernal prism]

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[rustic wedge]

so what does the 6 mean

like

in terms of the graph

[marsh mist]

X

[rustic wedge]

the x of what

[marsh mist]

🫠 uh

[rustic wedge]

the x intercept?

[marsh mist]

Yes

[rustic wedge]

the x intercept of what

which line

[marsh mist]

There's no line

[woven raptor]

Put the value of x in any of the equaltions and solve for y

[rustic wedge]

ugh i knew someone was gonna say this 💀

rip

i was trying to get op to think about what the x meant

[woven raptor]

oh I'm sorry

[marsh mist]

3x+4(6)=2?

[rustic wedge]

anyways op, why do we put the value of x into the equations

like, why does this work

ive been trying to get you to figure this out

[marsh mist]

Horizontal?

[rustic wedge]

have you ever done like a systems solve graphically

[marsh mist]

Can you show an example

[woven raptor]

consider a line x=y on the graph. For x=0 what would be y?

[rustic wedge]

so you have some lines (these are not your lines dw about this) right

so what are you looking for by solving the systems of equations?

[marsh mist]

Also 0? (0,0)

[marsh mist]

The x and y coordinate

[rustic wedge]

of what exactly

can you circle what youre finding

[marsh mist]

The point of the two lines

[rustic wedge]

yes the intersectyion point

so how do you find the value of y, knowing the value of x of the intersection point of the two lines?

hint: ||replace "the intersection point" with "a point on"||

[marsh mist]

Find the point on the vertical line

[rustic wedge]

i do not see vertical lines here

[marsh mist]

The y intercept

[rustic wedge]

that is not correct sadly

[marsh mist]

[rustic wedge]

okay lets take a step back

you have the x value of the point where they intersect right

so now you want the y value

the hint i gave was

the x value is on this line

[marsh mist]

Yes but why do I need to understand the graph?

I have never used method on a graph yet

[rustic wedge]

this will help you understand why you do what unibic told you to do

i think its important for you to understand why it helps with memory

because you can easily misremember this as something else and get it wrong in the future

[marsh mist]

Yes

[rustic wedge]

mhm

okay lets ask you a question thats similar but related

whats the value of y at x=5 for the line 3x-6?

[marsh mist]

Subsition?

[rustic wedge]

yea

what do you get

[marsh mist]

9

[rustic wedge]

mhm

so how can we aplpy that to your question

[marsh mist]

We substitute 6 into x? 3(6)+4y=2?

[rustic wedge]

mhm

yea

so we spent all that time on just figuring this out, but what i want you to remember is

the reason why you do that

is because youre trying to find the point of intersection.

the point of intersection is just the y value of the line at that x value.

[rustic wedge]

just like this question right here

does that make sense

[marsh mist]

I'm really slow at math D:

[marsh mist]

Yes

[rustic wedge]

nono dont worry

i made it a bit more complicated on purpose so you remember this key fact

[marsh mist]

18+4y=2???

[rustic wedge]

mhm

yea all you do is just solve for y

you know how to do this

[marsh mist]

-4 ;D

Thx for the help

+close