4f+85=5f+42

Solution for 4f+85=5f+42 equation:

Simplifying
4f + 85 = 5f + 42

Reorder the terms:
85 + 4f = 5f + 42

Reorder the terms:
85 + 4f = 42 + 5f

Solving
85 + 4f = 42 + 5f

Solving for variable 'f'.

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

Add '-5f' to each side of the equation.
85 + 4f + -5f = 42 + 5f + -5f

Combine like terms: 4f + -5f = -1f
85 + -1f = 42 + 5f + -5f

Combine like terms: 5f + -5f = 0
85 + -1f = 42 + 0
85 + -1f = 42

Add '-85' to each side of the equation.
85 + -85 + -1f = 42 + -85

Combine like terms: 85 + -85 = 0
0 + -1f = 42 + -85
-1f = 42 + -85

Combine like terms: 42 + -85 = -43
-1f = -43

Divide each side by '-1'.
f = 43

Simplifying
f = 43