Question

I need help with this problem. Please show work and tell me if its one solution or all or none.

2x-y=9
2x+y=11

Answer 1

x = 5, y = 1

Explanation:

2x - y = 9

2x + y = 11 subtract equation 2 from equation 1

0 - 2y = -2

y = -2/-2 = 1 substitute into equation 1 or 2 to solve for x

2x - 1 = 9

2x = 10

x = 10/2 = 5