Question

1) y = 7x+12
y=-8x-3 I need this step by step I don’t understand

Answer 1

Answer: x=-1, y=5

Explanation:

First, 7x+12 is substituted in for y in the second equation

7x+12=-8x-3

Add 8x to both sides

15x+12=-3

Subtract 12 from both sides

15x=-15

Divide both sides by 15

x=-1

To solve for y, substitute x into the first equation

7(-1)+12=y

-7+12=y

5=y