1=f+13

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Solution for 1=f+13 equation: 



1=f+13

We move all terms to the left:

1-(f+13)=0

We get rid of parentheses

-f-13+1=0

We add all the numbers together, and all the variables

-1f-12=0

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

-f=12

f=12/-1

f=-12

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