How to get to the expected result in wxMaxima

[ckl67]

Hello All,

The problem seems to be simple, but I don't know how to get the solution

Entered in wxMaxima

xt:xm-w/2;
z:w/(xmax-xmin+2*ma);
xa:xt/z;
x:xa+xmax/2+xmin/2;

expand(x);
              -(xm*xmin)/w + xmin + (xm*xmax)/w + (2*ma*xm)/w - ma

This is OK, but we can simplify a bit deeper.

Simplified by myself

x =  -(xm*xmin)/w + xmin + (xm*xmax)/w + (2*ma*xm)/w - ma
x = xm/w * (xmax-xmin + 2*ma) + xmin - ma
or
z = w/(xmax-xmin+2*ma)

So
x = xm/z + xmin - ma
Question:

Is there a possibility in wxMaxima to get this result ?

x = xm/z + xmin - ma

Thanks in advance

Christian

[Joseph Cusumano]

This does it:

solve('z=z,w)[1];
subst(%,x);
expand(factor(%));

[ckl67]

Joseph

Whaouuu !
Many many thanks

Great

Christian

[ckl67]

There is something which is strange.

I have run the sequence the first time and it worked well.
Now there is something which is blocking, and I don't understand why..
I run wxMaxima several times, and same issue

What do I do wrong ??

Thanks in advance

[Joseph Cusumano]

You have to be more careful. You lost the division operator in your definion of z. It should be:

z:w/(xmax-xmin+2*ma);

[ckl67]

Oh no..
I'm verry verry sorry to bother you for such stupid quest.

Many thanks ...
Christian