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How to setup system of linear equations in matrix form?

Asked by Giovanni Virgen on 30 Jun 2018
Latest activity Answered by Walter Roberson
on 30 Jun 2018
I have a system of four linear equations that I need to put into matrix form. Equations are in the form of:
5x1+4x2-2x3+6x4=4
3x1+6x2+6x3+4.5x4=10 etc.

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Answer by Ameer Hamza
on 30 Jun 2018

You can do it by making a matrix A of coefficients and a matrix b of the number on right side of the equations.
A = [column_of_coefficients_of_x1, column_of_coefficients_of_x2, ... column_of_coefficients_of_xn];
b = [column_of_values on RHS of the equations];
For the equations, you gave in the question,
A = [5 4 -2 6; ...
3 6 6 4.5];
b = [4; ...
10];
You can then solve the system using
A\b

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