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57=-u/2
We move all terms to the left:
57-(-u/2)=0
We get rid of parentheses
u/2+57=0
We multiply all the terms by the denominator
u+57*2=0
We add all the numbers together, and all the variables
u+114=0
We move all terms containing u to the left, all other terms to the right
u=-114
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