how do I check my answer to a problem.

The problem is:
x/5 - 1/2 = 3
I know the answer is 35/2 but how do you check it.
35/2 /5 - 1/2 = 3?

(35/2) / 5 - 0.5 = 3

17.5 / 5 - 0.5 = 3

3.5 - 0.5 = 3

3 = 3