-2(4-f)=20

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Solution for -2(4-f)=20 equation: 


Simplifying
-2(4 + -1f) = 20
(4 * -2 + -1f * -2) = 20
(-8 + 2f) = 20

Solving
-8 + 2f = 20

Solving for variable 'f'.

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

Add '8' to each side of the equation.
-8 + 8 + 2f = 20 + 8

Combine like terms: -8 + 8 = 0
0 + 2f = 20 + 8
2f = 20 + 8

Combine like terms: 20 + 8 = 28
2f = 28

Divide each side by '2'.
f = 14

Simplifying
f = 14

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