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21 February, 20:08

Infinito álgebra For - 2x-9y=-25 and - 4x-9y=-23

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  1. 21 February, 20:30
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    -2x - 9y = - 25

    - (-4x - 9y = - 23)

    2x = - 2

    x = - 1

    -2 (-1) - 9y = - 25

    2 - 9y = - 25

    -9y = - 25 - 2

    -9y = - 27

    y = 3

    (-1,3)
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