Matlab code for solving the following system equation

2x + y + 5z = 5; 2x + 2y +3z = 7 ; x + 3y + 3z = 6

[Igor Arkhandeev]

You should create two matrices:

A = [2, 1, 5; 2, 2, 3; 1, 3, 3];
B = [5;7;6];

Next a lot of ways to solve it. The most easiest:

x=inv(A)*B;

or

x = A\B;

[Muhammad Chandra]

y=〖2x〗^2+2x-20

[Walter Roberson]

@Muhammad Chandra

I do not understand that remark?

Answer 1

[Stephan]

>> A = [2 1 5; 2 2 3; 1 3 3]

A =

     2     1     5
     2     2     3
     1     3     3

>> b = [5; 7; 6]

b =

     5
     7
     6

>> sol = A\b

sol =

    2.4545
    1.4545
   -0.2727

>> test = A*sol

test =

     5
     7
     6

Answer 2

[Ronish]

Solve x=4=6

[Walter Roberson]

It seems doubtful that this is the solution -- it does not solve for y or z !