15-f=f+7

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Solution for 15-f=f+7 equation:


Simplifying
15 + -1f = f + 7

Reorder the terms:
15 + -1f = 7 + f

Solving
15 + -1f = 7 + f

Solving for variable 'f'.

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

Add '-1f' to each side of the equation.
15 + -1f + -1f = 7 + f + -1f

Combine like terms: -1f + -1f = -2f
15 + -2f = 7 + f + -1f

Combine like terms: f + -1f = 0
15 + -2f = 7 + 0
15 + -2f = 7

Add '-15' to each side of the equation.
15 + -15 + -2f = 7 + -15

Combine like terms: 15 + -15 = 0
0 + -2f = 7 + -15
-2f = 7 + -15

Combine like terms: 7 + -15 = -8
-2f = -8

Divide each side by '-2'.
f = 4

Simplifying
f = 4

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