-15-3f=-6(-f+7)

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Solution for -15-3f=-6(-f+7) equation: 



-15-3f=-6(-f+7)

We move all terms to the left:

-15-3f-(-6(-f+7))=0

We add all the numbers together, and all the variables

-3f-(-6(-1f+7))-15=0



We calculate terms in parentheses: -(-6(-1f+7)), so:

-6(-1f+7)

We multiply parentheses

6f-42

Back to the equation:

-(6f-42)



We get rid of parentheses

-3f-6f+42-15=0

We add all the numbers together, and all the variables

-9f+27=0

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

-9f=-27

f=-27/-9

f=+3

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