9f-8=5f+20

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Solution for 9f-8=5f+20 equation: 



9f-8=5f+20

We move all terms to the left:

9f-8-(5f+20)=0

We get rid of parentheses

9f-5f-20-8=0

We add all the numbers together, and all the variables

4f-28=0

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

4f=28

f=28/4

f=7

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