30 + 25 + 20 = 30 x 6 + 25 x 4 + 20 x 9

Let's solve the equation:

30 + 25 + 20 = 30 x 6 + 25 x 4 + 20 x 9
75 = 180 + 100 + 180
75 = 460

This equation is not correct.