SOLUTION: solve the system using matrices. express the solution set as (w,x,y,z) w- x+ y+ z= 10 2w x-4y+3z= 20 3w+ x- 3y-3z= -2 -w+ 2x+ y-3z= -17 the solution set is:

Algebra ->  Matrices-and-determiminant -> SOLUTION: solve the system using matrices. express the solution set as (w,x,y,z) w- x+ y+ z= 10 2w x-4y+3z= 20 3w+ x- 3y-3z= -2 -w+ 2x+ y-3z= -17 the solution set is:      Log On


   

Question 256454: solve the system using matrices. express the solution set as (w,x,y,z)
w- x+ y+ z= 10
2w x-4y+3z= 20
3w+ x- 3y-3z= -2
-w+ 2x+ y-3z= -17
the solution set is:
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
The assumption is that the equation is
2w%2Bx-4y%2B3z=+20
.
.
.
The determinant of the matrix is 74.
The inverse matrix is
[A]inv=
and the solution set [X] is,
[X]=%281%2F74%29%2A%28%0D%0A+matrix%28+4%2C+1%2C+%0D%0A354%2C26%2C70%2C342%29%29
(w,x,y,z)=(354/74,26/74,70/74,342/74)
NOTE : The answer is not in simplest terms.