7f+8=f+20

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Solution for 7f+8=f+20 equation:


Simplifying
7f + 8 = f + 20

Reorder the terms:
8 + 7f = f + 20

Reorder the terms:
8 + 7f = 20 + f

Solving
8 + 7f = 20 + 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.
8 + 7f + -1f = 20 + f + -1f

Combine like terms: 7f + -1f = 6f
8 + 6f = 20 + f + -1f

Combine like terms: f + -1f = 0
8 + 6f = 20 + 0
8 + 6f = 20

Add '-8' to each side of the equation.
8 + -8 + 6f = 20 + -8

Combine like terms: 8 + -8 = 0
0 + 6f = 20 + -8
6f = 20 + -8

Combine like terms: 20 + -8 = 12
6f = 12

Divide each side by '6'.
f = 2

Simplifying
f = 2

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