8=9f+4-7f

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Solution for 8=9f+4-7f equation: 



8=9f+4-7f

We move all terms to the left:

8-(9f+4-7f)=0

We add all the numbers together, and all the variables

-(2f+4)+8=0

We get rid of parentheses

-2f-4+8=0

We add all the numbers together, and all the variables

-2f+4=0

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

-2f=-4

f=-4/-2

f=+2

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