-9=f+7

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Solution for -9=f+7 equation: 



-9=f+7

We move all terms to the left:

-9-(f+7)=0

We get rid of parentheses

-f-7-9=0

We add all the numbers together, and all the variables

-1f-16=0

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

-f=16

f=16/-1

f=-16

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