2(f-4)=20

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



2(f-4)=20

We move all terms to the left:

2(f-4)-(20)=0

We multiply parentheses

2f-8-20=0

We add all the numbers together, and all the variables

2f-28=0

We move all terms containing f to the left, all other terms to the right

2f=28

f=28/2

f=14

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