Posted by **Mary** on Friday, October 4, 2013 at 12:30pm.

Which ordered triple is a solution of this system?

2x+y-z=7

-x-2y+4z=-15

x+2y=5z=17

(-2, 6, -5)

(1, 3, 2)

(2, 5, -2)

(3, 1, 0)

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