15+7f=12f

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Solution for 15+7f=12f equation: 



15+7f=12f

We move all terms to the left:

15+7f-(12f)=0

We add all the numbers together, and all the variables

-5f+15=0

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

-5f=-15

f=-15/-5

f=+3

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