15=3(f-12)

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Solution for 15=3(f-12) equation: 



15=3(f-12)

We move all terms to the left:

15-(3(f-12))=0



We calculate terms in parentheses: -(3(f-12)), so:

3(f-12)

We multiply parentheses

3f-36

Back to the equation:

-(3f-36)



We get rid of parentheses

-3f+36+15=0

We add all the numbers together, and all the variables

-3f+51=0

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

-3f=-51

f=-51/-3

f=+17

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