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 Jul 15, 2020
 #1
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The value of z = 15

 Jul 15, 2020
 #2
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\(\frac{1}{3}(6z+18)=3z-9\\ 2z+6=3z-9\\ 6+9=3z-2z\\ \boxed{z=15}\)

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 Jul 15, 2020

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