7(9+f)=84

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Solution for 7(9+f)=84 equation: 



7(9+f)=84

We move all terms to the left:

7(9+f)-(84)=0

We add all the numbers together, and all the variables

7(f+9)-84=0

We multiply parentheses

7f+63-84=0

We add all the numbers together, and all the variables

7f-21=0

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

7f=21

f=21/7

f=3

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