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-8u+3(u-3)=-19
We move all terms to the left:
-8u+3(u-3)-(-19)=0
We add all the numbers together, and all the variables
-8u+3(u-3)+19=0
We multiply parentheses
-8u+3u-9+19=0
We add all the numbers together, and all the variables
-5u+10=0
We move all terms containing u to the left, all other terms to the right
-5u=-10
u=-10/-5
u=+2
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