9+5f=f-7

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Solution for 9+5f=f-7 equation: 



9+5f=f-7

We move all terms to the left:

9+5f-(f-7)=0

We get rid of parentheses

5f-f+7+9=0

We add all the numbers together, and all the variables

4f+16=0

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

4f=-16

f=-16/4

f=-4

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