SOLUTION: Solve the system of equations by using the inverse of the coefficient matrix. -x-2y=8 3x+4y=24 also written as: x=x1 and y=x2 Please help! thanks!

Algebra ->  Matrices-and-determiminant -> SOLUTION: Solve the system of equations by using the inverse of the coefficient matrix. -x-2y=8 3x+4y=24 also written as: x=x1 and y=x2 Please help! thanks!      Log On


   

Question 620085: Solve the system of equations by using the inverse of the coefficient matrix.
-x-2y=8
3x+4y=24
also written as: x=x1 and y=x2
Please help!
thanks!
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

Solve the system of equations by using the inverse of the coefficient matrix.

 -x-2y=8

 3x+4y=24 

M+=+%28matrix%282%2C2%2Ca1%2Cb1%2Ca2%2Cb2%29%29+=+a1b2-b1a2                                  

I+=+%281%2F%28a1b2+-+b1a2%29%29%28matrix%282%2C2%2Cb2%2C-b1%2C-a2%2Ca1%29%29



M+=%28+matrix%282%2C2%2C-1%2C-2%2C3%2C4%29%29 = 2