I keep getting the error message that the variables must be of data type double and it is currently of type sym.

%I'm unsure how else to run this code to solve the 10 eqn system where
%the answer comes out in the correct form, please help

syms AB BC AD BD CD DE CE Ax Ay Ey

eqn1=Ax+AD==0;
eqn2=Ay+AB==0;
eqn3=74+BC+(3/5)*BD==0;
eqn4=-AB-(4/5)*BD==0;
eqn5=-BC+(3/5)*CE==0;
eqn6=-24-CD-(4/5)*CE==0;
eqn7=-AD+DE-(3/5)*BD==0;
eqn8=CD+(4/5)*BD==0;
eqn9=-DE-(3/5)*CE==0;
eqn10=Ey+(4/5)*CE==0;

[AB BC AD BD CD DE CE Ax Ay Ey]=solve(eqn1, eqn2, eqn3, eqn4, eqn5, eqn6, eqn7, eqn8, eqn9, eqn10,[AB BC AD BD CD DE CE Ax Ay Ey]) 

AB = 

BC = 

AD = 

74

BD = 

CD = 

DE = 

46

CE = 

Ax = 

Ay = 

Ey = 

[Walter Roberson]

The code works properly here.

Try

restoredefaultpath; rehash toolboxcache

[Ana]

it is still giving me these error messages

"Variable AB must be of data type double. It is currently of type sym. Check where the variable is assigned a value."

is it because I introduce them using 'syms', it also said i cannot use rehash in my code on Matlab Grader

Answer 1

[Walter Roberson]

%I'm unsure how else to run this code to solve the 10 eqn system where
%the answer comes out in the correct form, please help

syms AB BC AD BD CD DE CE Ax Ay Ey

eqn1=Ax+AD==0;
eqn2=Ay+AB==0;
eqn3=74+BC+(3/5)*BD==0;
eqn4=-AB-(4/5)*BD==0;
eqn5=-BC+(3/5)*CE==0;
eqn6=-24-CD-(4/5)*CE==0;
eqn7=-AD+DE-(3/5)*BD==0;
eqn8=CD+(4/5)*BD==0;
eqn9=-DE-(3/5)*CE==0;
eqn10=Ey+(4/5)*CE==0;

[AB BC AD BD CD DE CE Ax Ay Ey]=solve(eqn1, eqn2, eqn3, eqn4, eqn5, eqn6, eqn7, eqn8, eqn9, eqn10,[AB BC AD BD CD DE CE Ax Ay Ey]);

AB = double(AB);
BC = double(BC);
AD = double(AD);
BD = double(BD);
DE = double(DE);
CE = double(CE);
Ax = double(Ax);
Ay = double(Ay);
Ey = double(Ey);

[Ana]

that worked perfectly thank you so much!