7f+5=9f-9

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



7f+5=9f-9

We move all terms to the left:

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

We get rid of parentheses

7f-9f+9+5=0

We add all the numbers together, and all the variables

-2f+14=0

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

-2f=-14

f=-14/-2

f=+7

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