Question

x + 7y = -2
-x - 4y = -1

Answer 1

x + 7y = - 2
-x - 4y = - 1

3y = -3
y = -3/3
y = -1

x + 7y = -2
x + 7 . (-1) = - 2
x - 7 = - 2
x = -2 + 7
x = 5