SOLUTION: -18<-3x<21
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Algebra: Inequalities, trichotomy
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Question 181111
:
-18<-3x<21
Answer by
Mathtut(3670)
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-18<-3x<21--->-6>x>-7
:
-3x<21----->x>-7
-3x>-18---->x<6
:
(-6,7)
(