(f-3)+8=42

Solution for (f-3)+8=42 equation:

Simplifying
(f + -3) + 8 = 42

Reorder the terms:
(-3 + f) + 8 = 42

Remove parenthesis around (-3 + f)
-3 + f + 8 = 42

Reorder the terms:
-3 + 8 + f = 42

Combine like terms: -3 + 8 = 5
5 + f = 42

Solving
5 + f = 42

Solving for variable 'f'.

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

Add '-5' to each side of the equation.
5 + -5 + f = 42 + -5

Combine like terms: 5 + -5 = 0
0 + f = 42 + -5
f = 42 + -5

Combine like terms: 42 + -5 = 37
f = 37

Simplifying
f = 37