Hi,(adsbygoogle = window.adsbygoogle || []).push({});

Last day I learned about matrix equations like this:

AX = C

A–1AX = A–1C

IX = A–1C

X = A–1C

The objective of this is to Find X.

Here they done it by right multiplication of the Inverse matrix (A^-1).

My Questions are:

1) Where can I get more of these exercises and in higher level? (This exercise was fairly simple, but what about something like p^Tx^-1P^-1PX=APX)

Do you have some book that also shows in understandable way how to solve this?

Because when it's get harder I don't know how to approach it.

Do you have any tips? (Or good book)

2) The same question, but for the system of linear equations like this:

X - ky + z = 2 + kz

kx - 4y - 6z = k^2 + 2k - 9

2x + 4y + 8z = kx+2k(y+z-1) + 13 - k^2

Again, How to approach , and maybe some "Rule of thumbs" in general in solving equations.

For example I don't multiply with "-" and all the solution goes wrong…

Thanks a lot :)

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Solving Matrix equstions of the type: AX = C (FIND The X) - (NOT HW)

**Physics Forums | Science Articles, Homework Help, Discussion**