11u=12+9u

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Solution for 11u=12+9u equation: 



11u=12+9u

We move all terms to the left:

11u-(12+9u)=0

We add all the numbers together, and all the variables

11u-(9u+12)=0

We get rid of parentheses

11u-9u-12=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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