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7 July, 11:27

2x-3y-3z=-14 6x+2y-2z=-2

4x+2y-4z=-2

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  1. 7 July, 11:50
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    +2x - 2y + 3z = - 4

    2 (-3) - 2 (-7) + 3 (-4) = - 4

    -6 + 14 - 12 = - 4

    -18 + 14 = - 4
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