Question

I have been looking on the internet, at youtube videos, and on my online school workbook for help but I cannot find it. I really need help with solving this system using an augmented matrix. Please help me to understand how to do this!!

The problem is:
-x-3y+=-17 and
2x-6y+-26

I so far have the matrix made up.

-1 -3 | -17
2 -6 | -26

Answer 1

This is how solving by matrix works :

Answer 2

http://prntscr.com/4ucfxp

Answer 3

Sorry missed a few step on the inverse of the matrix, here it is : http://prntscr.com/4ucies

Answer 4

Thank you for the actual work, this helps, but could you also explain to me how you got those steps? Like what are the steps? Please and thank you. :)

Answer 5

I kind of explained that in there with A.X=B, those are general steps. Also, you'll always need to find A^(-1) and multiply it by B to get matrix X that you're looking for.

Answer 6

And this is what it will come to in the end : http://prntscr.com/4ucjuo

Answer 7

That's X=A^(-1)*B

Answer 8

If you're still having difficulties, take a look at this. It's really well explained here : http://www.mathsisfun.com/algebra/systems-linear-equations-matrices.html

Answer 9

Haha, thank you again, that helps a little more as well.

Answer 10

You're much welcome !