2u=9+u

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Solution for 2u=9+u equation: 



2u=9+u

We move all terms to the left:

2u-(9+u)=0

We add all the numbers together, and all the variables

2u-(u+9)=0

We get rid of parentheses

2u-u-9=0

We add all the numbers together, and all the variables

u-9=0

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

u=9

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