demonstration

Discussion in 'Math' started by braddy, Oct 16, 2005.

  1. braddy

    Thread Starter Well-Known Member

    Dec 29, 2004
    83
    0
    Hi ,
    Please can I have some help with this demonstration:
    Let a#0 ( #= different)
    Show that if a x b = a x c and a.b=a.c, then b=c ( Hint: Cross both sides of the first equation with a)

    When I cross by a ( as the hint suggests) , I found 0=0 ??

    thank you
     
  2. thingmaker3

    Retired Moderator

    May 16, 2005
    5,072
    6
    Try dividing both sides of the first equation by a. (What do you get when you divide a by a?)
     
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