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17 August, 15:35

X-y+z=6, 2y+z=12, z=2

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  1. 17 August, 18:36
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    For z=2⇒ 2y+2=12

    2y=12-2

    2y=10

    y=10:2

    y=5

    x - y+z=6

    x - 5 + 2=6

    x - 3 = 6

    x=6+3

    x=9
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