In Problems 918, verify that the values of the variables listed are solutions of the system of
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In Problems 9–18, verify that the values of the variables listed are solutions of the system of equations.
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4x 8x + 5y z = 0 -x = y+5z = 6 x = 2, y = -3, z = = 1; (2, -3,1) Z z = 7
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