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-12=3(u-8)-5u
We move all terms to the left:
-12-(3(u-8)-5u)=0
We calculate terms in parentheses: -(3(u-8)-5u), so:We get rid of parentheses
3(u-8)-5u
We add all the numbers together, and all the variables
-5u+3(u-8)
We multiply parentheses
-5u+3u-24
We add all the numbers together, and all the variables
-2u-24
Back to the equation:
-(-2u-24)
2u+24-12=0
We add all the numbers together, and all the variables
2u+12=0
We move all terms containing u to the left, all other terms to the right
2u=-12
u=-12/2
u=-6
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