-3f-7=8

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Solution for -3f-7=8 equation: 



-3f-7=8

We move all terms to the left:

-3f-7-(8)=0

We add all the numbers together, and all the variables

-3f-15=0

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

-3f=15

f=15/-3

f=-5

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