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4=11+2u
We move all terms to the left:
4-(11+2u)=0
We add all the numbers together, and all the variables
-(2u+11)+4=0
We get rid of parentheses
-2u-11+4=0
We add all the numbers together, and all the variables
-2u-7=0
We move all terms containing u to the left, all other terms to the right
-2u=7
u=7/-2
u=-3+1/2
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