Determine x and y such that: 2  -3  1       x-y 4  -2       4  1    -1
                             0  -1  0    +  0   x   0   =   0  2x+y  0

You should equate expression in respective cells.


cell (1,1) :    2 + (x-y) = 4           (1)

cell (2,2) :   -1 +   x   = 2x + y      (2)



It is your system of equations to find x and y.

Write it in the standard form


    x - y =  2       (3)

    x + y = -1       (4)


Add equations (3) and (4) to eliminate y.  You will get


    2x = 2 + (-1) = 1  ====>  x =  0.5.


Then from (4)  y = -1 - x = -1 - 0.5 = -1.5.


ANSWER.  x= 0.5;  y= -1.5.