3=5+2u

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Solution for 3=5+2u equation: 



3=5+2u

We move all terms to the left:

3-(5+2u)=0

We add all the numbers together, and all the variables

-(2u+5)+3=0

We get rid of parentheses

-2u-5+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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