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23 June, 11:09

Michael bought 2 notebooks and 1 pen for 7 dollars. Rick bought one notebook and 5 pens for 8 dollars

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  1. 23 June, 12:47
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    Notebooks=x

    pens=y

    7=2x+y

    8=x+5y = = > x=8-5y

    substitute into the first equation

    7=2 (8-5y) + y

    7=16-10y+y

    7=16-9y

    -9=-9y

    y=1

    now substitute y to find x

    x=8-5y

    x=8-5 (1)

    x=8-5

    x=3

    assuming you want amount of money for each item, a notebook is $3, and a pen is $1.
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