-21=f/7

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Solution for -21=f/7 equation: 



-21=f/7

We move all terms to the left:

-21-(f/7)=0

We add all the numbers together, and all the variables

-(+f/7)-21=0

We get rid of parentheses

-f/7-21=0

We multiply all the terms by the denominator


-f-21*7=0

We add all the numbers together, and all the variables

-1f-147=0

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

-f=147

f=147/-1

f=-147

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