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-4(u-12)=4
We move all terms to the left:
-4(u-12)-(4)=0
We multiply parentheses
-4u+48-4=0
We add all the numbers together, and all the variables
-4u+44=0
We move all terms containing u to the left, all other terms to the right
-4u=-44
u=-44/-4
u=+11
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