-7f+8+9=-28

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Solution for -7f+8+9=-28 equation: 



-7f+8+9=-28

We move all terms to the left:

-7f+8+9-(-28)=0

We add all the numbers together, and all the variables

-7f+45=0

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

-7f=-45

f=-45/-7

f=6+3/7

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