i need help figuring out the code to solve 6 non linear equation

Here is my code:

syms a b c d e f

oBal=(-a*2) + c*2 + d*2 + e*2+f*1==0;

cBal=c*4+e*1==6;

hBal=c*7+d*8+f*2-(12+b*3)==0;

nBal=(-b*1)+c*1==0;

Rq=e/a==1.3;

Y=(c*101.1039)/(112.1265)==0.5;

sol=solve(oBal,cBal,hBal,nBal,Rq,Y);

sol.a;

sol.b;

sol.c;

sol.d;

sol.e;

sol.f;

disp(a)

disp(b)

disp(c)

disp(d)

disp(e)

disp(f)

Answer 1

[Stephan]

Hi,

your code is ok - just convert the symbolic results to numeric:

syms a b c d e f
oBal=(-a*2) + c*2 + d*2 + e*2+f*1==0;
cBal=c*4+e*1==6;
hBal=c*7+d*8+f*2-(12+b*3)==0;
nBal=(-b*1)+c*1==0;
Rq=e/a==1.3;
Y=(c*101.1039)/(112.1265)==0.5;
sol=solve(oBal,cBal,hBal,nBal,Rq,Y);
format long
sol_a = double(sol.a)
sol_b = double(sol.b)
sol_c = double(sol.c)
sol_d = double(sol.d)
sol_e = double(sol.e)
sol_f = double(sol.f)
format short

gives:

sol_a =

     2.909196152898918

sol_b =

     0.554511250307852

sol_c =

     0.554511250307852

sol_d =

     3.872758845869675

sol_e =

     3.781954998768593

sol_f =

   -10.600057884094404

Best regards

Stephan

[Jonathan semple]

that works great! thank you for the help!