-87=3(f+70)

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Solution for -87=3(f+70) equation: 



-87=3(f+70)

We move all terms to the left:

-87-(3(f+70))=0



We calculate terms in parentheses: -(3(f+70)), so:

3(f+70)

We multiply parentheses

3f+210

Back to the equation:

-(3f+210)



We get rid of parentheses

-3f-210-87=0

We add all the numbers together, and all the variables

-3f-297=0

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

-3f=297

f=297/-3

f=-99

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