(14-f)+(f+6)+(f)=91

Solution for (14-f)+(f+6)+(f)=91 equation:

Simplifying
(14 + -1f) + (f + 6) + (f) = 91

Remove parenthesis around (14 + -1f)
14 + -1f + (f + 6) + (f) = 91

Reorder the terms:
14 + -1f + (6 + f) + (f) = 91

Remove parenthesis around (6 + f)
14 + -1f + 6 + f + (f) = 91
14 + -1f + 6 + f + f = 91

Reorder the terms:
14 + 6 + -1f + f + f = 91

Combine like terms: 14 + 6 = 20
20 + -1f + f + f = 91

Combine like terms: -1f + f = 0
20 + 0 + f = 91
20 + f = 91

Solving
20 + f = 91

Solving for variable 'f'.

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

Add '-20' to each side of the equation.
20 + -20 + f = 91 + -20

Combine like terms: 20 + -20 = 0
0 + f = 91 + -20
f = 91 + -20

Combine like terms: 91 + -20 = 71
f = 71

Simplifying
f = 71