Given: g(x) = -3/5x + 1/2. Find: when g(x) = 8

My work:
-3/5x + 1/2 = 8
-6x + 5 = 80
-6x = 75
x = 75/6
x = 25/2
What did I do wrong??

-6x = 75

x = - 75/6