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-49=-u/2
We move all terms to the left:
-49-(-u/2)=0
We get rid of parentheses
u/2-49=0
We multiply all the terms by the denominator
u-49*2=0
We add all the numbers together, and all the variables
u-98=0
We move all terms containing u to the left, all other terms to the right
u=98
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