SOLUTION: -18<-3x<21

Algebra.Com
Question 181111: -18<-3x<21
Answer by Mathtut(3670)   (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)

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