4. One of the most common uses for matrices is in solving a set of linear equations, e.g., we have three variables xl, x2, and x3 and three equations. 3x1 + 2r2 + x3 = 2, %3D x1 +x2 +3r3 2.x1 – 12 +...

Extracted text: 4. One of the most common uses for matrices is in solving a set of linear equations, e.g., we have three variables xl, x2, and x3 and three equations. 3x1 + 2r2 + x3 = 2, %3D x1 +x2 +3r3 2.x1 – 12 + 2x3 2, 1. We can represent a set of such equations by: Ax = b, Where () 3 2 1 1 3 (1) A = x = and b = 2 -1 2 Write Matlab code to solve this problem. [8]