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I spent more than around 15hrs trying to find values of two equations but no result comes out yet.

My two equations are:

(1.8778e21)=((n*x)/(n+0.0080))(1-exp(-5400*(x+0.0080)))

(3.3658e21)=((n*x)/(n+0.0189))(1-exp(-5400*(x+0.0189)))

I used sym and solve(equ,var) in MATLAB but 

x =

[ empty sym ]

Do you have any idea please because I need urgently

Amro
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Hisham Alghamdi
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1 Answers1

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The equations are inconsistent, so there is no solution for these.

And hence the result: [ empty sym ]

P0W
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  • can I know why they are inconsistent please? – Hisham Alghamdi Sep 15 '13 at 13:00
  • @HishamAlghamdi why do you think it has a solution ? I can't really explain this here. You may want to ask a question [here](http://math.stackexchange.com/questions/ask) – P0W Sep 15 '13 at 13:58
  • @HishamAlghamdi If you draw surfaces corresponding to the two equations as functions of n and x, they may not intersect: if they don't there is no exact solution (but there may be a least-squares solution). – Buck Thorn Sep 15 '13 at 16:07