[newb] simple equation substitutions

*To*: undisclosed-recipients:;*Subject*: [mg128535] [newb] simple equation substitutions*From*: Neal Becker <ndbecker2 at gmail.com>*Date*: Thu, 1 Nov 2012 03:19:28 -0400 (EDT)*Approved*: Steven M. Christensen <steve@smc.vnet.net>, Moderator*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com*Delivered-to*: l-mathgroup@wolfram.com*Delivered-to*: mathgroup-newout@smc.vnet.net*Delivered-to*: mathgroup-newsend@smc.vnet.net*Newsgroups*: comp.soft-sys.math.mathematica

{y == x + 2, x == 7} Solve[%, y] -> {} What I expected to happen is have x->7 applied to y == x+2. My real plan is to develop a list of (a lot more complicated) expressions that will have repeated substitutions applied. Why didn't the above work and/or what should I do instead?

**Follow-Ups**:**Re: simple equation substitutions***From:*Murray Eisenberg <murray@math.umass.edu>

**Re: simple equation substitutions***From:*Bob Hanlon <hanlonr357@gmail.com>