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-6u+3=-8-2u-1
We move all terms to the left:
-6u+3-(-8-2u-1)=0
We add all the numbers together, and all the variables
-6u-(-2u-9)+3=0
We get rid of parentheses
-6u+2u+9+3=0
We add all the numbers together, and all the variables
-4u+12=0
We move all terms containing u to the left, all other terms to the right
-4u=-12
u=-12/-4
u=+3
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