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3u/12=-12
We move all terms to the left:
3u/12-(-12)=0
We add all the numbers together, and all the variables
3u/12+12=0
We multiply all the terms by the denominator
3u+12*12=0
We add all the numbers together, and all the variables
3u+144=0
We move all terms containing u to the left, all other terms to the right
3u=-144
u=-144/3
u=-48
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