You have teh following equation:
x/5 - 8 = - 2
In order to solve the previous equation for x, you proceed as follow:
x/5 - 8 = -2 add 8 both sides
x/5 = - 2 + 8 simplify
x/5 = 6 multiply by 5 both sides (to cancel out denominator 5)
x = 6(5)
x = 30
Hence, the solution to the given equation is x = 30