Adding equations

*To*: mathgroup at smc.vnet.net*Subject*: [mg14342] Adding equations*From*: Lawrence Walker <lwalker701 at earthlink.net>*Date*: Thu, 15 Oct 1998 00:28:46 -0400*Organization*: Morgan State University: COMSARE*Sender*: owner-wri-mathgroup at wolfram.com

Group: I've been trying to add two equations as follows: In[4]:= a==b; In[5]:= c==d; In[6]:= %4+%5 Out[6]= (a==b)+(c==d) The result I was looking for is (a+c)==(b+d). The following works but it seems clumsy. In[7]:= %4[[1]]+%5[[1]]==%4[[2]]+%5[[2]] Out[7]= a+c==b+d Is there a way to elegantly add (sub, mult, div) two equations? Also is there an elegant way to add (sub, mult, div) an expression to both sides of an equation? Lawrence Walker

**Follow-Ups**:**Re: Adding equations***From:*Jurgen Tischer <jtischer@col2.telecom.com.co>

**Re: Adding equations***From:*Garrett Tim Sos <gts@mindspring.com>

**Re: Adding equations***From:*Daniel Lichtblau <danl>