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-29=-8u+3(u+7)
We move all terms to the left:
-29-(-8u+3(u+7))=0
We calculate terms in parentheses: -(-8u+3(u+7)), so:We get rid of parentheses
-8u+3(u+7)
We multiply parentheses
-8u+3u+21
We add all the numbers together, and all the variables
-5u+21
Back to the equation:
-(-5u+21)
5u-21-29=0
We add all the numbers together, and all the variables
5u-50=0
We move all terms containing u to the left, all other terms to the right
5u=50
u=50/5
u=10
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