can someone please explain
h t t p : / / w w w . j i s k h a . c o m / d i s p l a y . c g i ? i d = 1 2 5 7 0 4 1 1 4 5
In the long thread following
http://www.jiskha.com/display.cgi?id=1257041145 ,
Jim's answer is correct. x cannot equal 3 because it leads to a zero denominator