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12=u/2-11
We move all terms to the left:
12-(u/2-11)=0
We get rid of parentheses
-u/2+11+12=0
We multiply all the terms by the denominator
-u+11*2+12*2=0
We add all the numbers together, and all the variables
-1u+46=0
We move all terms containing u to the left, all other terms to the right
-u=-46
u=-46/-1
u=+46
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