Barton Willis wrote:
> Try using 'subst' to substitute values for a1, a2, r1, and r2.
> Something like
>
> exp1 : a1*s*h1=(h2-h1)/r1 +u;
> exp2 : a2*s*h2 = -(h2 -h1)/r1 - h2/r2;
> subst([a1=1,a2=1,r1=1/2,r2=1/3],[exp2,exp1]);
> solve(%,[h1,h2]);
>
> should work.
>
> BW
>
> -----maxima-bounces at math.utexas.edu wrote: -----
>
>
>> To:
>> From: Doug Stewart
>> Sent by: maxima-bounces at math.utexas.edu
>> Date: 10/22/2007 07:49PM
>> cc: maxima at math.utexas.edu
>> Subject: beginner question
>>
>> I have
>>
>>
>> exp1:a1*s*h1=(h2-h1)/r1 +u;
>> exp2:a2*s*h2 = -(h2 -h1)/r1 - h2/r2;
>> a1=1;
>> a2=1;
>> r1=.5;
>> r2=1/3;
>> solve([exp2,exp1],[h1,h2]);
>>
>> and this works but now I want to use the numerical values for a1 a2 r1
>> r2.
>>
>> How do I get a final answer.
>> Thanks
>> Doug Stewart
>> _______________________________________________
>> Maxima mailing list
>> Maxima at math.utexas.edu
>> http://www.math.utexas.edu/mailman/listinfo/maxima
>>
>
>
Thanks It works
This is what I was thinking :-)
exp1:a1*s*h1=(h2-h1)/r1 +u;
exp2:a2*s*h2 = -(h2 -h1)/r1 - h2/r2;
a1:1;
a2:1;
r1:.5;
r2:1/3;
solve([exp2,exp1],[h1,h2]);