Algebra

posted by Zoe

Steve and Belinda are selling pies for a school fundraiser. Customers can buy apple pies and cherry pies.
John sold 3 apple pies and 9 cherry pies for a total of $183.
Belinda sold 6 apple pies and 13 cherry pies for a total of $276.
What is the cost each of one apple pies and cherry pies ?

  1. Damon

    3 a + 9 c = 183
    6 a + 13 c = 276

    multiply first equation by 2

    6 a + 18 c = 366
    6 a + 13 c = 276
    ---------------- subtract
    5 c = 90
    c = 18
    etc

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