Question

5x - y = 3
3x + 7y = -21

Answer 1

-3

Explanation:

Solve for y in 5x-y=35x−y=3.

y=5x-3

2 Substitute y=5x-3y=5x−3 into 3x+7y=-213x+7y=−21.

38x-21=-21

3 Solve for x in 38x-21=-2138x−21=−21.

x=0

4 Substitute x=0 into y=5x-3y=5x−3.

y=−3

Answer 2

Answer: x=0 and y=-3

Explanation: