Solve the above set of equations symbolically by \"solve\" command. Follow below

Question

Solve the above set of equations symbolically by "solve" command. Follow below, study how it works. It is easier to copy/paste these in a new m-file. In that case, you wouldn't need to retype in case of errors. syms x y z % Define symbols x, y, z. eq1 = x + 2*y + 3*z - 4 % Move all arguments to one side: so that eq1 = 0 ... % Do the same for the other two equations. [xx, yy, zz] = solve (eq1, eq2, eq3, x, y, z) % Solve equations symbolically % Note order of variable names. % The answers are rational numbers (long fractions) convert to decimal: xx = double (xx) % Repeat for yy, zz.

Explanation / Answer

syms x y z
eqn1 = x + 2*y + 3*z == 4;
eqn2 = -x + y - z == 6;
eqn3 = x + 2*y + 2*z == 5;
[xx,yy,zz]=solve(eqn1,eqn2,eqn3,x,y,z);%assign the output to the variable
xx=double(xx); %converting into double
yy=double(yy);
zz=double(zz);
disp(xx); %display the result
disp(yy);
disp(zz);

output:

-1

4

-1

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