4f-9+8f=-30

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Solution for 4f-9+8f=-30 equation: 



4f-9+8f=-30

We move all terms to the left:

4f-9+8f-(-30)=0

We add all the numbers together, and all the variables

12f+21=0

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

12f=-21

f=-21/12

f=-1+3/4

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