4f-15=f+12

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Solution for 4f-15=f+12 equation: 



4f-15=f+12

We move all terms to the left:

4f-15-(f+12)=0

We get rid of parentheses

4f-f-12-15=0

We add all the numbers together, and all the variables

3f-27=0

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

3f=27

f=27/3

f=9

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