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26 October, 19:15

Solve each system by graphing

y=-4/9x-3

y=-7/5x-3

+4
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  1. 26 October, 21:47
    0
    Y = - 4/9x-3

    y = - 7/5x-3

    -4/9x-3 = - 7/5x-3

    -4 (5x-3) = - 7 (9x-3)

    -20x + 12 = - 63x + 21

    -20x + 63x = 21 - 12

    43x = 9

    43x/43 = 9/43

    x = 9/43

    y = - 4/9x-3

    y = - 4/9 (9/43) - 3

    y = - 4 / (81/43-3)

    y = - 4 / (81-129/43)

    y = - 4 / - 48/43

    y = - 4 * 43/-48

    y = - 172/-48

    y = 3 28/48 or 3 7/12
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