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-2u+8(u-4)=28
We move all terms to the left:
-2u+8(u-4)-(28)=0
We multiply parentheses
-2u+8u-32-28=0
We add all the numbers together, and all the variables
6u-60=0
We move all terms containing u to the left, all other terms to the right
6u=60
u=60/6
u=10
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