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3 May, 00:07

Find z: x+y=z y-z=x

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Answers (2)
  1. 3 May, 00:53
    0
    z = y

    Step-by-step explanation:

    Substitute the second equation into the first one:

    (y-z) + y = z

    Open up

    2y - z = z

    2y = 2z

    y = z - ->

    x=0
  2. 3 May, 01:31
    0
    z = y

    Step-by-step explanation:

    x+y=z

    y-z=x

    Substitute the second equation in for x

    y - z + y = z

    Add z to each side

    2y - z+z = z+z

    2y = 2z

    y = z
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