12-3u=9u+45

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Solution for 12-3u=9u+45 equation: 



12-3u=9u+45

We move all terms to the left:

12-3u-(9u+45)=0

We get rid of parentheses

-3u-9u-45+12=0

We add all the numbers together, and all the variables

-12u-33=0

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

-12u=33

u=33/-12

u=-2+3/4

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