Question

Solve the system of equations.
2x+8y=8

2x−4y=−16

Answer 1

Subtract the second equation from the first:
(2x+8y) − (2x−4y) = 8 − (−16) → 12y = 24 → y = 2.

Plug y = 2 into 2x + 8y = 8:
2x + 16 = 8 → 2x = −8 → x = −4.

Solution: x = −4, y = 2.