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

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

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

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

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

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

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

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

Combine like terms: -14 + 6 = -8
-8 + f + f + f = 91

Combine like terms: f + f = 2f
-8 + 2f + f = 91

Combine like terms: 2f + f = 3f
-8 + 3f = 91

Solving
-8 + 3f = 91

Solving for variable 'f'.

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

Add '8' to each side of the equation.
-8 + 8 + 3f = 91 + 8

Combine like terms: -8 + 8 = 0
0 + 3f = 91 + 8
3f = 91 + 8

Combine like terms: 91 + 8 = 99
3f = 99

Divide each side by '3'.
f = 33

Simplifying
f = 33