how do you find solutions of this marix equation using matlab 2019

how to find solutions of this matrix using matlab 2019.

Ax = b

A = [3.8 -7.8;8.4 -16.8;-12.9 -41.4]
b = [1.3;2.8;-4.3]

Answer 1

[Rik]

Let's first do some algebra, and then solve it with a oneliner:

%{
Ax = b
A\Ax = A\b     (A\A = 1)
x = A\b
%}
A = [3.8 -7.8;8.4 -16.8;-12.9 -41.4];
b = [1.3;2.8;-4.3];
x=A\b