12u=9u+18

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Solution for 12u=9u+18 equation: 



12u=9u+18

We move all terms to the left:

12u-(9u+18)=0

We get rid of parentheses

12u-9u-18=0

We add all the numbers together, and all the variables

3u-18=0

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

3u=18

u=18/3

u=6

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