-4f-9=-7f

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



-4f-9=-7f

We move all terms to the left:

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

We get rid of parentheses

-4f+7f-9=0

We add all the numbers together, and all the variables

3f-9=0

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

3f=9

f=9/3

f=3

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