15=2u+3

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Solution for 15=2u+3 equation: 



15=2u+3

We move all terms to the left:

15-(2u+3)=0

We get rid of parentheses

-2u-3+15=0

We add all the numbers together, and all the variables

-2u+12=0

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

-2u=-12

u=-12/-2

u=+6

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