SOLUTION: -18<-3x<21

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Question 181111: -18<-3x<21
Answer by Mathtut(3670) About Me  (Show Source):
You can put this solution on YOUR website!
-18<-3x<21--->-6>x>-7
:
-3x<21----->x>-7
-3x>-18---->x<6
:
(-6,7)