31=-9f-6f

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Solution for 31=-9f-6f equation: 



31=-9f-6f

We move all terms to the left:

31-(-9f-6f)=0

We add all the numbers together, and all the variables

-(-15f)+31=0

We get rid of parentheses

15f+31=0

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

15f=-31

f=-31/15

f=-2+1/15

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