Question

Solve the system of equations -2x - y = 8 and 8x + 6y = -16 by combining the equations

Answer 1

x=-8 and y=8

Explanation:

-2x-y=8

8x+6y=-16

Multiply the first equation by 4, then add both equations.

-8x-4y=32

8x+6y=-16

2y=16

y=8

Plug back y=8 into any of the equations

8x+6(8)=-16

8x+48=-16

8x=-64

x=-8