Algebra

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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)

  • Algebra - eh? -

    fixing the typo so the 3rd line reads
    x+2y+5z=17
    still doesn't produce one of the choices.
    Another typo?

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