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-9u+20=-3(3u-8)
We move all terms to the left:
-9u+20-(-3(3u-8))=0
We calculate terms in parentheses: -(-3(3u-8)), so:We get rid of parentheses
-3(3u-8)
We multiply parentheses
-9u+24
Back to the equation:
-(-9u+24)
-9u+9u-24+20=0
We add all the numbers together, and all the variables
-4!=0
There is no solution for this equation
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