-7f-9=9-4f

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



-7f-9=9-4f

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

-7f+4f-9-9=0

We add all the numbers together, and all the variables

-3f-18=0

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

-3f=18

f=18/-3

f=-6

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