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25 August, 02:47

Find the ordered triple of these equations. x + 2y + 2z = 02x + y + z = 3x - 3y - z = 1

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  1. 25 August, 02:50
    0
    {x+2y+2z=0

    {2x+y+z=3

    {x-3y-z=1

    {x+2y+2z=0

    -

    {4x+2y+2z=6

    {-3x=-6 → x=2

    {-3y-z=-1

    +

    {y+z=-1

    {-2y=-2 → y=1

    {2+2+2z=0 → 2z=-4 → z=-2

    Final triple is

    (2; 1; - 2)
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