Question

PLEASE HELP!!!!!!!!!!
Solve each system of equations using a matrix.
3x+y=2
-x+2y=11
Please walk me through this ):

Answer 1

Do you have any idea?

Answer 2

not at all really. out of all this chapter this is the only thing that i cant get D:

Answer 3

If you could explain it in the easiest way possible i would be ever so greatful!

Answer 4

ok fine.. ll tell u the basic idea

if you have an equation like the following

Ax + By = C
Dx + Ey = F

then you can solve it as

| A B | | x | | C |
| D E | | y | = | D |

then you shift the ABDE matrix on the other side and call it the inverse..

evaluate the inverse..

Answer 5

Yeh, this is really hard for me. ):

Answer 6

so basically you understood nothing from what i just posted? :-/

Answer 7

not really...

Answer 8

ermm.. you need to use your textbook.. i can't explain the entire method here :P.. it ll take me forever to type!!

Answer 9

k i dont have a textook really, im homeschooled.

Answer 10

isn't there any example problem?

Answer 11

Hey Shelby... ever heard of Cramer's rule? Was it perhaps mentioned in passing when this was being discussed?

Answer 12

uhm, i think. we talked about RREF ?

Answer 13

can u help