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-4u-40=4(u+4)
We move all terms to the left:
-4u-40-(4(u+4))=0
We calculate terms in parentheses: -(4(u+4)), so:We get rid of parentheses
4(u+4)
We multiply parentheses
4u+16
Back to the equation:
-(4u+16)
-4u-4u-16-40=0
We add all the numbers together, and all the variables
-8u-56=0
We move all terms containing u to the left, all other terms to the right
-8u=56
u=56/-8
u=-7
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