Question

\begin{aligned} & 12x-5y = -20 \\\\ & y=x+4 \end{aligned}
​

12x−5y=−20
y=x+4
​ Plz help me.

Answer 1

I'm assuming you want to find the point of intersection?

Answer 2

Yes.

Answer 3

So there are a couple ways of going about to find the POI (point of intersection)
1) Graphing
2) Substitution
3) Elimination
Do you know how to do any of these processes?

Answer 4

I only use the first one it comes the most naturally to me.

Answer 5

Yes, you could do it by graphing on a paper and pen but it's not always the most accurate.
I'd suggest you use method 2 or 3. You should learn these methods

Answer 6

Why don't we do this question with substitution?

Answer 7

Aww.... Fine

Answer 8

So, as the name suggests, substitution is just substituting.
We have:
(1) 12x-5y = -20
(2) y = x+4
We literally just substitute eqn 2 into eqn 1. In eqn 2 it's telling us that y is equal to x+4. So for every time we see "y" in eqn 1 we'll substitute it with x+4.
Give that a shot.

Answer 9

Ok...?

Answer 10

So do that and let me know what you get

Answer 11

I got 0' 4

Answer 12

Yessir

Answer 13

Yay! Thank you.

Answer 14

No problem!