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Formula simplify for Solve

• To: mathgroup at smc.vnet.net
• Subject: [mg80881] Formula simplify for Solve
• From: "Lea Rebanks" <lrebanks at netvigator.com>
• Date: Wed, 5 Sep 2007 02:30:07 -0400 (EDT)

Formula simplify for Solve
 
PB2=(A[[2]]*D)+(A[[3]]*B[[1]]+A[[5]]*D)+(A[[3]]*B[[1]]+A[[2]]*B[[2]]+A[[1]]*
D)+(A[[2]]*B[[1]]+A[[3]]*B[[6]]+A[[2]]*B[[3]]+A[[1]]*D)+(A[[5]]*B[[1]]+A[[4]
]*B[[7]]+A[[3]]*B[[3]]+A[[2]]*B[[4]]+A[[1]]*D)


Hi there,

Please look at the above math statement. I want to incorporate very long
statements into long formulas & then solve for  D  - is there anyway of
abbreviating the above statement to a simple letter(s) like PB2 & then be
able to still solve for  D? I am sure you can - please show me how with
Mathematia example.

BTW - I am using version 5.1.0.0 on a PC

Many thanks for your attention.
Mr.Lea Rebanks.