f=2f-20

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Solution for f=2f-20 equation: 


Simplifying
f = 2f + -20

Reorder the terms:
f = -20 + 2f

Solving
f = -20 + 2f

Solving for variable 'f'.

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

Add '-2f' to each side of the equation.
f + -2f = -20 + 2f + -2f

Combine like terms: f + -2f = -1f
-1f = -20 + 2f + -2f

Combine like terms: 2f + -2f = 0
-1f = -20 + 0
-1f = -20

Divide each side by '-1'.
f = 20

Simplifying
f = 20

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