Monday, May 20, 2013

Solve -4 < 3x + 1 < 10

-4 < 3 x + 1 < 10 
-4-1 < 3 x +1-1 < 10-1 
-5 < 3 x < 9 
-5/3 < (3 x)/3 < 9/3 
-5/3 < x < 3 

:)
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