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MathGroup Archive 1999

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Re: Manipulation of equations and inequalities in "high-school style"

  • To: mathgroup at smc.vnet.net
  • Subject: [mg19531] Re: [mg19516] Manipulation of equations and inequalities in "high-school style"
  • From: "David Park" <djmp at earthlink.net>
  • Date: Tue, 31 Aug 1999 00:52:22 -0400
  • Sender: owner-wri-mathgroup at wolfram.com

Silvano,

There are probably a number of approaches to this. I have a high school tutorial
StepByStepEquations.nb which you can down load from my web site given below. It shows
how to do what you wish using regular Mathematica commands.

David Park
djmp at earthlink.net
http://home.earthlink.net/~djmp/



>Does anybody know a Mathematica (3 or 4) package which allows
>manipulaton of equations and inequalities like high-school students
>are supposed to do?
>
>For example
>
>2x+a = x-b      subtract a
>  2x = x-b-a    divide by 2, subtract x
>   x = -b-a
>
>or
>
> (2^x-1)^(1/2) = 5b                 log both sides
>(1/2)(x-1)log2 = log5 + logb        multiply by 2, divide by log2
>
>
>                 2(log5 + logb)     add 1
>           x-1 = --------------
>                     log2
>
>and so on.
>
>I think I saw such a notebook or package some years ago, but I am not
>able to find it any more.
>I think I am not the only teacher who would find this very useful.
>Thanks for all hints.
>
>Silvano D'Orazio
>
>
>
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