13-3f=15-4f

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Solution for 13-3f=15-4f equation: 



13-3f=15-4f

We move all terms to the left:

13-3f-(15-4f)=0

We add all the numbers together, and all the variables

-3f-(-4f+15)+13=0

We get rid of parentheses

-3f+4f-15+13=0

We add all the numbers together, and all the variables

f-2=0

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

f=2

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