x + y = -4 --- (1)
x - y = 10 --- (2)
From (2), we have:
y = x - 10 --- (3)
Substituting (3) into (1), we will get:
x + x - 10 = -4
2x = 10 - 4
2x = 6
x = 6 / 2
x = 3
Substituting x = 3 into (3), we will get:
y = 3 - 10
y = -7
Hence, x = 3 and y = -7.