Tuesday, May 21, 2013

Solve |-6-3m| > 21

Every term is a multiple of 3, so we divide it out to get 

%0D%0Aabs%28-2-m%29%3E7%0D%0A 
Since both terms in the absolute value have the same sign we can rewrite it as 

%0D%0Aabs%28m%2B2%29%3E7%0D%0A 


which means
m+2< -7 or m+2>7
m<-9 or m>5 


:) 

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