13+20f=4f-17+18f

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Solution for 13+20f=4f-17+18f equation: 



13+20f=4f-17+18f

We move all terms to the left:

13+20f-(4f-17+18f)=0

We add all the numbers together, and all the variables

20f-(22f-17)+13=0

We get rid of parentheses

20f-22f+17+13=0

We add all the numbers together, and all the variables

-2f+30=0

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

-2f=-30

f=-30/-2

f=+15

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