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-24=-8u+4(u+3)
We move all terms to the left:
-24-(-8u+4(u+3))=0
We calculate terms in parentheses: -(-8u+4(u+3)), so:We get rid of parentheses
-8u+4(u+3)
We multiply parentheses
-8u+4u+12
We add all the numbers together, and all the variables
-4u+12
Back to the equation:
-(-4u+12)
4u-12-24=0
We add all the numbers together, and all the variables
4u-36=0
We move all terms containing u to the left, all other terms to the right
4u=36
u=36/4
u=9
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