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-9-17u=19-15u
We move all terms to the left:
-9-17u-(19-15u)=0
We add all the numbers together, and all the variables
-17u-(-15u+19)-9=0
We get rid of parentheses
-17u+15u-19-9=0
We add all the numbers together, and all the variables
-2u-28=0
We move all terms containing u to the left, all other terms to the right
-2u=28
u=28/-2
u=-14
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