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16 July, 12:22

What is the x coordinate in the solution of the system of equations y = - 2/3x and 4x - 9y = - 40

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  1. 16 July, 15:16
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    The two given equations are:

    y = - 2/3 x

    4x - 9y = - 40

    Substitute by the first equation in the second as follows:

    4x - 9 (-2/3 x) = - 40

    4x + 6x = - 40

    10x = - 40

    x = - 4
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