4f+8f-3f=81-9

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Solution for 4f+8f-3f=81-9 equation: 



4f+8f-3f=81-9

We move all terms to the left:

4f+8f-3f-(81-9)=0

We add all the numbers together, and all the variables

4f+8f-3f-72=0

We add all the numbers together, and all the variables

9f-72=0

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

9f=72

f=72/9

f=8

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