3=8+f

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Solution for 3=8+f equation: 



3=8+f

We move all terms to the left:

3-(8+f)=0

We add all the numbers together, and all the variables

-(f+8)+3=0

We get rid of parentheses

-f-8+3=0

We add all the numbers together, and all the variables

-1f-5=0

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

-f=5

f=5/-1

f=-5

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