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5(2-u)-u=2(+1)
We move all terms to the left:
5(2-u)-u-(2(+1))=0
We add all the numbers together, and all the variables
5(-1u+2)-u-(21)=0
We add all the numbers together, and all the variables
-1u+5(-1u+2)-21=0
We multiply parentheses
-1u-5u+10-21=0
We add all the numbers together, and all the variables
-6u-11=0
We move all terms containing u to the left, all other terms to the right
-6u=11
u=11/-6
u=-1+5/6
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