Question

Solve for x, y, z using inverse matrices:

x+y-z=2
2x+3y-6z=5
-4x-5y+0.25z=-9

Answer 1

My teacher says to use a calculator to solve this, but I keep getting huge numbers when I plug it in my calculator. I'm not really sure how to solve this problem using a calculator.

Answer 2

you get to use a calculator?

Answer 3

http://www.wolframalpha.com/input/?i=x%2By-z%3D2,+2x%2B3y-6z%3D5,+-4x-5y%2B0.25z%3D-9

Answer 4

Hope you know how to use a handheld calculator that has matrix operations built in, and that you'll try using it here.

Answer 5

Oh, thank you!