9f-7=f+9

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



9f-7=f+9

We move all terms to the left:

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

We get rid of parentheses

9f-f-9-7=0

We add all the numbers together, and all the variables

8f-16=0

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

8f=16

f=16/8

f=2

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