+0  
 
0
709
1
avatar
i dont understand when you have to switch an inequality sign
 Aug 30, 2012
 #1
avatar
0
When you have a problem like :
-3x -4 > 7
-3x +4 > +4
You minus add the opposite to it so plus +4 so that cancels those 4's, then add 4 to the 7.
So thats... Divide by a negitive 3.
-3x > 11
----- ------
-3 -3
When you divide by a negitive number it switches the inequality sign!
so... x < -3.66...
 Sep 5, 2012

2 Online Users

avatar
avatar