-20-f=20-6f+20

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Solution for -20-f=20-6f+20 equation:


Simplifying
-20 + -1f = 20 + -6f + 20

Reorder the terms:
-20 + -1f = 20 + 20 + -6f

Combine like terms: 20 + 20 = 40
-20 + -1f = 40 + -6f

Solving
-20 + -1f = 40 + -6f

Solving for variable 'f'.

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

Add '6f' to each side of the equation.
-20 + -1f + 6f = 40 + -6f + 6f

Combine like terms: -1f + 6f = 5f
-20 + 5f = 40 + -6f + 6f

Combine like terms: -6f + 6f = 0
-20 + 5f = 40 + 0
-20 + 5f = 40

Add '20' to each side of the equation.
-20 + 20 + 5f = 40 + 20

Combine like terms: -20 + 20 = 0
0 + 5f = 40 + 20
5f = 40 + 20

Combine like terms: 40 + 20 = 60
5f = 60

Divide each side by '5'.
f = 12

Simplifying
f = 12

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