-8f=20-7f

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Solution for -8f=20-7f equation: 



-8f=20-7f

We move all terms to the left:

-8f-(20-7f)=0

We add all the numbers together, and all the variables

-8f-(-7f+20)=0

We get rid of parentheses

-8f+7f-20=0

We add all the numbers together, and all the variables

-1f-20=0

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

-f=20

f=20/-1

f=-20

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