Can someone work this out for me? I'm so confused!

Solve the system by using substitution.
y + 6x = 11
3x + 2y = -5

y = 11-6x

3x + 2(11-6x) = -5
3x + 22 - 12x = -5
-9x = -27
x = 3
so, y = 11-18 = -7