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Set up and solve a system of equations for each problem

John 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 one cherry pies?

1 answer

3a + 9c = 183
... 6a + 18c = 366

6a + 13c = 276

subtract equations to eliminate a

solve for c, then substitute back to find a
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