Question

• Write a MATLAB script to Solve the following system of four linear equations using MATLAB left division operator.

2w-x+5y+z=-3

3w+2x+2y-6z=-32

w+3x+3y-z=-47

5w-2x-3y+3z=49

• Then using only one fprintf command, write the values you find for w, x, y and z in a text file called values.txt.
• The values of w and x should be written in one line and values of y and z in the next line of your file.
• The values in each line should be separated with a comma (as shown below). Show each value with three digits after decimal.

w,x

y,z

• The script should have at the top a comment with 2-3 lines of explanation,

Answer 1

clc;clear all
%%The given code solves for w,x,y and z using left division operator
%%Matrix A has the coefficients of the variables w,x,y and x
%%Matrix B has the RHS vector
%%Matrix X finds the solution
%%Output is printed as desired
A=[2 -1 5 1;3 2 2 -6;1 3 3 -1;5 -2 -3 3];
B=[-3;-32;-47;49];
X=A\B;
fprintf('Value of w is: %5.3f . Value of x is: %5.3f \n. Value of y is: %5.3f . Value of z is %5.3f',X(1),X(2),X(3),X(4))