trying to solve |2x-1|-|x+5|-3=0:
3. The Attempt at a Solution [/B]
for x>1/2 I got x=9
for -5<x<1/2 I got x=-7/3
but for x<-5 I got -(2x-1)-(-(x+5))-3=0 => x=3 (which is incorrect)
why x=3 is incorrect , or why I shouldn't considerate the case x<-5 ?