MathGroup Archive: October 2009 [00592]

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ReplaceAll and rules from a list v7.0

To: mathgroup at smc.vnet.net
Subject: [mg104227] ReplaceAll and rules from a list v7.0
From: kristoph <kristophs.post at web.de>
Date: Sat, 24 Oct 2009 02:40:20 -0400 (EDT)

Hi,

Suppose I have the equation

x=a+b

and the list

l={{1,1},{2,2},{3,3}}

How can I quickly assign the list to the above equation, that is, I
would like to get the following result

{2,4,6}

The first element of each sub-list should be assigned to a and the
second to b.

Thanks in advance.
Kristoph

Follow-Ups:
- Re: ReplaceAll and rules from a list v7.0
  - From: Matthias Greiff <greiff@mac.com>
- RE: ReplaceAll and rules from a list v7.0
  - From: Richard Hofler <rhofler@bus.ucf.edu>
- Re: ReplaceAll and rules from a list v7.0
  - From: Leonid Shifrin <lshifr@gmail.com>
- Re: ReplaceAll and rules from a list v7.0
  - From: Adriano Pascoletti <adriano.pascoletti@dimi.uniud.it>

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