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8=11+u=64
We move all terms to the left:
8-(11+u)=0
We add all the numbers together, and all the variables
-(u+11)+8=0
We get rid of parentheses
-u-11+8=0
We add all the numbers together, and all the variables
-1u-3=0
We move all terms containing u to the left, all other terms to the right
-u=3
u=3/-1
u=-3
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