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u/9+1=8
We move all terms to the left:
u/9+1-(8)=0
We add all the numbers together, and all the variables
u/9-7=0
We multiply all the terms by the denominator
u-7*9=0
We add all the numbers together, and all the variables
u-63=0
We move all terms containing u to the left, all other terms to the right
u=63
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