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Math Help - price question

  1. #1
    Newbie
    Joined
    Oct 2008
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    Post price question

    Cindy wants to paint her office. She can buy three cans of the same-priced paint
    and three identical brushes for $21, or she can buy four cans of the same paint
    and one brush for $22. How much does a can of paint cost?
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  2. #2
    MHF Contributor
    Joined
    Apr 2008
    Posts
    1,092
    Set up a system of equations. Let x = the price of a can of paint and y = the price of a brush.

    Then:
    3x + 3y = 21
    4x + y = 22

    Does this make sense?
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