15f+6+5f=86

Solution for 15f+6+5f=86 equation:

Simplifying
15f + 6 + 5f = 86

Reorder the terms:
6 + 15f + 5f = 86

Combine like terms: 15f + 5f = 20f
6 + 20f = 86

Solving
6 + 20f = 86

Solving for variable 'f'.

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

Add '-6' to each side of the equation.
6 + -6 + 20f = 86 + -6

Combine like terms: 6 + -6 = 0
0 + 20f = 86 + -6
20f = 86 + -6

Combine like terms: 86 + -6 = 80
20f = 80

Divide each side by '20'.
f = 4

Simplifying
f = 4