free software for solving three equations of this type...

Hi everybody,

I join you because I need help (Tmi)

I want to solve three equations with three unknown values (x,y,,z) and the known constants are (a,b,c,d,e,f,g,h,i) but I would like to be able to change them easily without having to recalculate !!

The equations are from the type:

a=x*b + (((c+d)^2)/((c/(y/e)+d/(z/f))

g=y*c + (((b+d)^2)/((b/(x/h)+d/(z/f))

i=z*d + (((b+c)^2)/((b/(x/h)+c/(y/e))

I can of course simplify this equations by implementing all the known values but I would like to be able to vary these values! Some may have recognize these equations, they are for the thermal conductivity of composites with fibers in three orthotropic directions! I have values for several materials, some several constants and for each material, I want to find out x,y and z!

So, I would like to find a free software where I can put the full form of my equations and input the constants seperately!

Do you have any clue of where I can find such an "easy" software :)

Please help me:confused:

Regards

Jeremie who is not able to create a software for this(Sadsmile)

I cant solve it so easily as ax2 + bx + c!

Hi Topsquark (Dan),

Thank you for your time!:)

In fact I already knew how to solve y=ax2 + bx + c but the equations I displayed are more complicated in my sense since when you develop them even with the values for a,b,c...i, then you will obtain coeficcient like x*y, y*z and maybe even more complicated, I just gave up at this time!

That is why I really would like to use a software since my purpose is not really to learn how to solve but to solve :D

In this frame, do you or anyone else can futher guide me towards a software solution to my problem??

Thanks in advance

Jeremie

I want a software, please!!

Dan,

Thanks again for your efforts and your time :)

Nevretheless, I do believe that you forgot something in the three first equations:

a=bx + (yz(c+d)^2)/(ceZ+dfY)

and so on...

Which leads to even more work to solve it!

So that it why, I really would like to find a SOFTWARE to save time!!

Once again, I know that I can do it but I am lazy that is why I connected here!! To find an easiest solution!!

PLEASE HELP ME

Thanks in advance

mathematical regards

jeremie