12-u=-4

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Solution for 12-u=-4 equation: 



12-u=-4

We move all terms to the left:

12-u-(-4)=0

We add all the numbers together, and all the variables

-1u+16=0

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

-u=-16

u=-16/-1

u=+16

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