19=9u-u

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Solution for 19=9u-u equation: 



19=9u-u

We move all terms to the left:

19-(9u-u)=0

We add all the numbers together, and all the variables

-(+8u)+19=0

We get rid of parentheses

-8u+19=0

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

-8u=-19

u=-19/-8

u=2+3/8

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