Question

-5x-4y=15
6x+8y=-18
Solve each system by elimination

Answer 1

x = -3

y = -3x/4-9/4

Answer 2

1) Multiply top equation by 2 -> -10x-8y=30

2) Add both equations:

-10x-8y=30

+ 6x+8y=-18

__________

-4x=12

3) Divide both sides by -4 -> x=-3

4) Plug value of x into either equation:

6(-3)+8y=-18

-18+8y=-18

8y=0

y=0

So x=-3 and y=0

Hope this helped!