+0  
 
-6
310
1
avatar+72 

Solve:

 

-2 < x + 1 < 2

 

-6 ≤ -3x - 15 ≤ 12

 Jun 7, 2018
 #1
avatar+107493 
+2

-2 < x + 1 < 2    subtract  1 from everything

 

-3 < x <  1

 

 

-6 ≤ -3x - 15 ≤ 12       add 15 to  everything

 

9  ≤ -3x  ≤ 27         divide  everything  by -3 and  reverse the inequality signs

 

-3 ≥ x ≥ -9

 

 

cool cool cool

 Jun 7, 2018

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