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-2+11u=12u-19
We move all terms to the left:
-2+11u-(12u-19)=0
We get rid of parentheses
11u-12u+19-2=0
We add all the numbers together, and all the variables
-1u+17=0
We move all terms containing u to the left, all other terms to the right
-u=-17
u=-17/-1
u=+17
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