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-55=u/2
We move all terms to the left:
-55-(u/2)=0
We add all the numbers together, and all the variables
-(+u/2)-55=0
We get rid of parentheses
-u/2-55=0
We multiply all the terms by the denominator
-u-55*2=0
We add all the numbers together, and all the variables
-1u-110=0
We move all terms containing u to the left, all other terms to the right
-u=110
u=110/-1
u=-110
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