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OpenStudy (anonymous):
Solve the following system of equations. x + 3y - z = 2 x - 2y + 3z = 7 x + 2y - 5z = -21 (2, 3, 5) (-2, 3, 5) (2, -3, 5) (2, 3, -5)
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OpenStudy (anonymous):
umm you could use matrix
OpenStudy (anonymous):
what is matrix?
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