2=4+-2f

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Solution for 2=4+-2f equation: 



2=4+-2f

We move all terms to the left:

2-(4+-2f)=0

We add all the numbers together, and all the variables

-(-2f)+2=0

We get rid of parentheses

2f+2=0

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

2f=-2

f=-2/2

f=-1

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