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