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Using Solve[] - What did I do wrong?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg109305] Using Solve[] - What did I do wrong?
  • From: eric948470 <eric948470 at gmail.com>
  • Date: Wed, 21 Apr 2010 04:30:57 -0400 (EDT)

Hi,

If you look at the command below, you would probably be able to
understand what I was trying to do. I have linear equations, and I
want to solve for the variable g2, and I don't want the variables dx1,
dx2, dy1 and dy2 in the answer. What I get for the output is {{}}.
What did I do wrong?

Solve[{phi2 + a2*dx1 + b2*dy1 + c2*dx2 + d2*dy2 == 0,
  psi2 + A2*dx1 + B2*dy1 + c2*dx2 + D2*dy2 == 0, dx2 == -g2 - f2*dy2,
  dx1 == -g1 - f1*dy1}, g2, {dx1, dx2, dy1, dy2}]


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