SOLUTION: How do i solve this problem ? -18 (_<)less then or equal to 3x < 21

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Question 176103: How do i solve this problem ?
-18 (_<)less then or equal to 3x < 21
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
-18 (_<)less then or equal to 3x < 21
-18<=3x<21
Divide by 3
-6<=x<7