54-(0.75x+2.5)=42.5

Solution for 54-(0.75x+2.5)=42.5 equation:

Simplifying
54 + -1(0.75x + 2.5) = 42.5

Reorder the terms:
54 + -1(2.5 + 0.75x) = 42.5
54 + (2.5 * -1 + 0.75x * -1) = 42.5
54 + (-2.5 + -0.75x) = 42.5

Combine like terms: 54 + -2.5 = 51.5
51.5 + -0.75x = 42.5

Solving
51.5 + -0.75x = 42.5

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-51.5' to each side of the equation.
51.5 + -51.5 + -0.75x = 42.5 + -51.5

Combine like terms: 51.5 + -51.5 = 0.0
0.0 + -0.75x = 42.5 + -51.5
-0.75x = 42.5 + -51.5

Combine like terms: 42.5 + -51.5 = -9
-0.75x = -9

Divide each side by '-0.75'.
x = 12

Simplifying
x = 12