-21=0.07f

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Solution for -21=0.07f equation: 



-21=0.07f

We move all terms to the left:

-21-(0.07f)=0

We add all the numbers together, and all the variables

-(+0.07f)-21=0

We get rid of parentheses

-0.07f-21=0

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

-0.07f=21

f=21/-0.07

f=-299+0.07/0.07

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