3f-9f=30

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Solution for 3f-9f=30 equation: 



3f-9f=30

We move all terms to the left:

3f-9f-(30)=0

We add all the numbers together, and all the variables

-6f-30=0

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

-6f=30

f=30/-6

f=-5

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