9.50x + 60 = 460

Basic math man. Subtract 60 from both sides and divide by 9.5.

Let me divulge further into what Adonai stated. 

You start with 

9.50x + 60 = 460

Subtract 60 from both sides to get:

9.50x = 400

Then isolate x by dividing 9.50 from both sides:

x ≈ 42.10

42.10 =x