8f-7=-31

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Solution for 8f-7=-31 equation: 



8f-7=-31

We move all terms to the left:

8f-7-(-31)=0

We add all the numbers together, and all the variables

8f+24=0

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

8f=-24

f=-24/8

f=-3

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