02-15-2019 06:36 PM
All the high-end scientific HP calculators can easily solve systems of 6 (or more) simultaneous linear equations. No software needs to be added; it's built-in. However, we need to know which calculator model you have to help you further.
02-15-2019 07:24 PM - edited 02-16-2019 08:26 AM
Hi!, @Bobert2411 :
You write the serial number of your HP PRIME GRAPHING CALCULATOR, what have expired warranty. See ...
Now, please, from Show Option Menu (three horizontal points) at right top, Edit Reply, delete the Serial Number (S/N°). This code isn't the Product Number (P/N).
For your HP PRIME, model G8X92AA, you can see ... https://www.youtube.com/watch?v=K_MAnrWSrgQ
02-16-2019 06:56 AM
Thank you, Maké, for figuring out that the model being used is an HP Prime!
Bobert, please mark Maké's reply as the solution.
However, if you're ever in a real rush, here's a cool shortcut that HP has included in their high-end scientifics for many years. To solve any size system of linear equations, you can do it directly from the keyboard using a single division. Just divide the constants by the coefficients, like the following example:
To solve this 6×6 system:
All it takes is this single division:
Please notice that the numerator is the vector of the constants from the right side of the equations, using single square brackets, and the denominator is the matrix of the coefficients from the left side of the equations, using double square brackets. The result of course indicates that a=1, b=-2, c=3, d=4, e=2, and f=-1. This shortcut method can be used in either Home (as shown above) or CAS.
Hope that helps! Disclaimer: I don't work for HP. I'm just another HP calculator enthusiast.