2 x 2 Simultaneous Equations for the HP-17BII+

This program is by Eddie Shore and is used here by permission.

This program is supplied without representation or warranty of any kind. Eddie Shore and The Museum of HP Calculators therefore assume no responsibility and shall have no liability, consequential or otherwise, of any kind arising from the use of this program material or any part thereof.

Overview

This equations solves for X and Y in the system of equations:

AX + BY = C
DX + EY = F

This equation uses the Let and Get functions. Solve for X and Y. There is no solution if the matrix [[A B][D E]] is singular.

Listing

SIM2X2:0×(A+B+C+D+E+F+L(M:A×E-B×D))=
IF(S(X):(C×E-B×F)÷G(M)-X:IF(S(Y):(A×F-C×D)÷G(M)-Y:0)

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