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-4u-28=4(u-1)
We move all terms to the left:
-4u-28-(4(u-1))=0
We calculate terms in parentheses: -(4(u-1)), so:We get rid of parentheses
4(u-1)
We multiply parentheses
4u-4
Back to the equation:
-(4u-4)
-4u-4u+4-28=0
We add all the numbers together, and all the variables
-8u-24=0
We move all terms containing u to the left, all other terms to the right
-8u=24
u=24/-8
u=-3
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