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(2u-7)=18
We move all terms to the left:
(2u-7)-(18)=0
We get rid of parentheses
2u-7-18=0
We add all the numbers together, and all the variables
2u-25=0
We move all terms containing u to the left, all other terms to the right
2u=25
u=25/2
u=12+1/2
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