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-3(u+4)=+2u
We move all terms to the left:
-3(u+4)-(+2u)=0
We multiply parentheses
-3u-(+2u)-12=0
We get rid of parentheses
-3u-2u-12=0
We add all the numbers together, and all the variables
-5u-12=0
We move all terms containing u to the left, all other terms to the right
-5u=12
u=12/-5
u=-2+2/5
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