Question

5n-2(n-2)=-11
what is n?
i got -5 but not sure

Answer 1

Have you plugged it back into your original equation?
5*(-5) - 2(-5 - 2) = -11
This would be a good way to check. If you get -11 = -11, then n=-5 is true.

Answer 2

I think it looks good, though.
5n - 2(n - 2) = -11
5n- 2*n - 2*(-2) = -11
5n - 2n + 4 = -11
3n + 4 = -11
Solving this equation does seem to get you n= -5.