15=2u-9

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Solution for 15=2u-9 equation: 



15=2u-9

We move all terms to the left:

15-(2u-9)=0

We get rid of parentheses

-2u+9+15=0

We add all the numbers together, and all the variables

-2u+24=0

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

-2u=-24

u=-24/-2

u=+12

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