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-4u+8(u-3)=4
We move all terms to the left:
-4u+8(u-3)-(4)=0
We multiply parentheses
-4u+8u-24-4=0
We add all the numbers together, and all the variables
4u-28=0
We move all terms containing u to the left, all other terms to the right
4u=28
u=28/4
u=7
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