12=f+5

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Solution for 12=f+5 equation: 



12=f+5

We move all terms to the left:

12-(f+5)=0

We get rid of parentheses

-f-5+12=0

We add all the numbers together, and all the variables

-1f+7=0

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

-f=-7

f=-7/-1

f=+7

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