7f=8f-4

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Solution for 7f=8f-4 equation: 



7f=8f-4

We move all terms to the left:

7f-(8f-4)=0

We get rid of parentheses

7f-8f+4=0

We add all the numbers together, and all the variables

-1f+4=0

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

-f=-4

f=-4/-1

f=+4

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