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8=u-18/9
We move all terms to the left:
8-(u-18/9)=0
We add all the numbers together, and all the variables
-(u-2)+8=0
We get rid of parentheses
-u+2+8=0
We add all the numbers together, and all the variables
-1u+10=0
We move all terms containing u to the left, all other terms to the right
-u=-10
u=-10/-1
u=+10
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