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Solve::ivar: xxx is not a valid variable. >>

  • To: mathgroup at smc.vnet.net
  • Subject: [mg117204] Solve::ivar: xxx is not a valid variable. >>
  • From: Morten Jørgensen <mail at maarten.dk>
  • Date: Fri, 11 Mar 2011 04:34:44 -0500 (EST)
Hi guys,
why is it that I get this message

Solve::ivar: 3777.865080388886` is not a valid variable. >>

while using numbers from previous calculations (Q, m, C, T2) in this
equation

Solve[Q == m * C * (T3 - T2), T3]


Regards, Morten
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