90-42.5=n

Solution for 90-42.5=n equation:

Simplifying
90 + -42.5 = n

Combine like terms: 90 + -42.5 = 47.5
47.5 = n

Solving
47.5 = n

Solving for variable 'n'.

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

Add '-1n' to each side of the equation.
47.5 + -1n = n + -1n

Combine like terms: n + -1n = 0
47.5 + -1n = 0

Add '-47.5' to each side of the equation.
47.5 + -47.5 + -1n = 0 + -47.5

Combine like terms: 47.5 + -47.5 = 0.0
0.0 + -1n = 0 + -47.5
-1n = 0 + -47.5

Combine like terms: 0 + -47.5 = -47.5
-1n = -47.5

Divide each side by '-1'.
n = 47.5

Simplifying
n = 47.5