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10 September, 17:46

Which expression gives the z-coordinate of the solution of the system x+2y-2z=3?

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  1. 10 September, 19:31
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    From the system of equation

    x+2y-2z=3

    3x-y+z=16

    x+z=7

    we solve the system as follows:

    add equation i and ii

    x+2y-2z=3

    6x-2y+2z=32

    7x=35

    x=5

    thus

    z=2

    2y+5-4=3

    2y=2

    y=1

    hence

    x=5, y=1 z=2
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