-6u+18-9u=-12

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Solution for -6u+18-9u=-12 equation: 



-6u+18-9u=-12

We move all terms to the left:

-6u+18-9u-(-12)=0

We add all the numbers together, and all the variables

-15u+30=0

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

-15u=-30

u=-30/-15

u=+2

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