13=f/9

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Solution for 13=f/9 equation: 



13=f/9

We move all terms to the left:

13-(f/9)=0

We add all the numbers together, and all the variables

-(+f/9)+13=0

We get rid of parentheses

-f/9+13=0

We multiply all the terms by the denominator


-f+13*9=0

We add all the numbers together, and all the variables

-1f+117=0

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

-f=-117

f=-117/-1

f=+117

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