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How to solve a system of linear equations ?

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Hi,how can i solve this system in Mupad and get only the positive real solutions.
x + y + z = 50
5x + y + 0.1z = 50
Thank You :)

Risposta accettata

Friedrich
Friedrich il 6 Mar 2013
Modificato: Friedrich il 6 Mar 2013
Hi,
You have 3 degrees of freedom and 2 eqations, so there is NO unique solution.
So doing some basic math gives:
z free to choose and
x = 0.225*z
y = 50 - 1.225*z
So when you choose z to be 40 you get x = 9 and y = 1.

Più risposte (1)

Azzi Abdelmalek
Azzi Abdelmalek il 5 Mar 2013
sol=[1 1 1;5 1 0.1]\[50;50]
  2 Commenti
Sudo
Sudo il 6 Mar 2013
this doesn't give a real solution.the solution i want should be 9,1 and 40.
Youssef  Khmou
Youssef Khmou il 6 Mar 2013
hi :
a=[1 1 1;5 1 0.1]
b=[50 50]';
sol=pinv(a)*b; %Pseudo inverse

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