9u-12u=12

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Solution for 9u-12u=12 equation: 



9u-12u=12

We move all terms to the left:

9u-12u-(12)=0

We add all the numbers together, and all the variables

-3u-12=0

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

-3u=12

u=12/-3

u=-4

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