x + y = -7, x-y = 18 solve by addition method

Question

Solving the system by the addition method

Answer 1

x + y = -7, x-y = 18 solve by addition method

x + y = -7

x-y = 18

Adding the second equation to the first we obtain:

2x=11

x=5.5

x + y = -7

5.5+y=-7

y=-12.5