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29 October, 02:18

5x+2y=9

3x-7y=-11

Qual o valor do X e do Y?

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  1. 29 October, 06:13
    0
    5x+2y=9

    3x-7y=-11

    5 (1) + 2 (2) = 9

    5+4=9

    3 (1) - 7 (2) = - 11

    3 - (14) = - 11

    x = 1

    y = 2
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