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-16=-2u-6
We move all terms to the left:
-16-(-2u-6)=0
We get rid of parentheses
2u+6-16=0
We add all the numbers together, and all the variables
2u-10=0
We move all terms containing u to the left, all other terms to the right
2u=10
u=10/2
u=5
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