HP 49g manual @Solve

	2	3 − 5					x				13 
		− 3					1				
A = 	1		8		,	x =  x2			, and	b = 	− 13 .
	2	− 2									
			4 			 x3					− 6 

This system has the same number of equations as of unknowns, and will be referred to as a square system. In general, there should be a unique solution to the system. The solution will be the point of intersection of the three planes in the coordinate system (x1, x2, x3) represented by the three equations.

To enter matrix A you can activate the Matrix Writer while the A: field is selected. The following screen shows the Matrix Writer used for entering matrix A, as well as the input form for the numerical solver after entering

matrix A (press		in the Matrix Writer):
Press	to select the B: field. The vector b can be entered as a row vector
with a single set of brackets, i.e.,			.

After entering˜matrix`A and vector b, and with the X: field highlighted, we can

press to attempt a solution to this system of equations:

A solution was found as shown next.

@SOLVE! [13,-13,-6]@@@OK@@@ Page 9-9