7(f-2)=21

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Solution for 7(f-2)=21 equation: 



7(f-2)=21

We move all terms to the left:

7(f-2)-(21)=0

We multiply parentheses

7f-14-21=0

We add all the numbers together, and all the variables

7f-35=0

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

7f=35

f=35/7

f=5

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