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26 May, 01:47

If 3x + 4y = 7 and 2y = 6x + 6, then what is xy

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  1. 26 May, 01:54
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    3x + 12x + 12 = 7

    15x + 12 = 7

    15x = - 5

    x = 1/3

    3 (1/3) + 4y = 7

    1 + 4y = 7

    4y = 6

    y = 1.5

    3 (1/3) + 4 (1.5) = 7
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