3=1+2u

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Solution for 3=1+2u equation: 



3=1+2u

We move all terms to the left:

3-(1+2u)=0

We add all the numbers together, and all the variables

-(2u+1)+3=0

We get rid of parentheses

-2u-1+3=0

We add all the numbers together, and all the variables

-2u+2=0

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

-2u=-2

u=-2/-2

u=1

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