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3=32+u
We move all terms to the left:
3-(32+u)=0
We add all the numbers together, and all the variables
-(u+32)+3=0
We get rid of parentheses
-u-32+3=0
We add all the numbers together, and all the variables
-1u-29=0
We move all terms containing u to the left, all other terms to the right
-u=29
u=29/-1
u=-29
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