Please HELP Im going insane (1 Viewer)

[bmcdancer]

Can some one write the answer out for me?
x + y +z =9
3x- y +z = -1
-2x + 2y - 3z= -2


Thank you!!

 

[Zeber]

x + y +z =9 (1)
3x- y +z = -1 (2)
-2x + 2y - 3z= -2 (3)

-----(1)+(2)
4x + 2z = 8

----2.(2) + (3)
4x -z = -4 ----- link this with above eqn.

3z = 12
z = 3

then just solve it.

 

[gurmies]

z = 4, y = 5, x = 0....if you really want a worked solution i'll give it, but it's just a long and tedious method