3(f+13)=84

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Solution for 3(f+13)=84 equation: 



3(f+13)=84

We move all terms to the left:

3(f+13)-(84)=0

We multiply parentheses

3f+39-84=0

We add all the numbers together, and all the variables

3f-45=0

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

3f=45

f=45/3

f=15

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