f-8f=20-12f

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Solution for f-8f=20-12f equation: 


Simplifying
f + -8f = 20 + -12f

Combine like terms: f + -8f = -7f
-7f = 20 + -12f

Solving
-7f = 20 + -12f

Solving for variable 'f'.

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

Add '12f' to each side of the equation.
-7f + 12f = 20 + -12f + 12f

Combine like terms: -7f + 12f = 5f
5f = 20 + -12f + 12f

Combine like terms: -12f + 12f = 0
5f = 20 + 0
5f = 20

Divide each side by '5'.
f = 4

Simplifying
f = 4

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