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13 October, 05:39

Y = 3x-5

6x + 3y = 15

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  1. 13 October, 05:58
    0
    y = 3x - 5

    So substitute 3x-5 for y:

    6x + 3 (3x-5) = 15

    Simplify:

    6x + 9x - 15 = 15

    15x - 15 = 15

    x - 15 = 1

    x = 16

    THEN find y by plugging the value of x back into the first equation:

    y = 3 (16) - 5

    y = 48 - 5

    y = 43
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