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-10z is less than or equal to 15
 Sep 13, 2013
 #1
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0
After simplify,
-2z is less than or equal to 3
 Sep 13, 2013
 #2
avatar+104 
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-10z ≤ 15 [/(-10)]

z ≥ -3/2
 Sep 13, 2013

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