Sold X cakes.
Sold Y pies.
Eq1: x + y = 9.
Eq2: 13x + 6y = 75.
Multiply Eq1 by -6 and add the Eqs.
A corner store sells two kinds of baled goods:cakes and pies.A cake costs $13 and a pie cost $6.In one day ,the store sold 9 baked goods for a total of $75 .How many cakes did they sell
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