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14=5u+u
We move all terms to the left:
14-(5u+u)=0
We add all the numbers together, and all the variables
-(+6u)+14=0
We get rid of parentheses
-6u+14=0
We move all terms containing u to the left, all other terms to the right
-6u=-14
u=-14/-6
u=2+1/3
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