Question

If x-y = -10 and x-y = 2 what is the value of x

Answer 1

x = -4

Explanation:

x+y = -10 or y = -10 - x

substitute this into the second equation

x - y = 2

x - (-10-x) = 2

2x + 10 = 2

2x = -8

x = - 4