7=15-4f

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Solution for 7=15-4f equation: 



7=15-4f

We move all terms to the left:

7-(15-4f)=0

We add all the numbers together, and all the variables

-(-4f+15)+7=0

We get rid of parentheses

4f-15+7=0

We add all the numbers together, and all the variables

4f-8=0

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

4f=8

f=8/4

f=2

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