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OpenStudy (anonymous):
Sarah went to an electronics store, purchased 3 CDs and 5 DVDs, and spent $137. Michelle went to the same store, bought 2 CDs and 7 DVDs, and spent $161. How much does each CD sell for at the store? Answer $19 $14 $18 $13
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OpenStudy (anonymous):
3x+5y=137 2x+7y=161 x..CD and y..DVD
OpenStudy (anonymous):
21x+35y=959 10x+35y=805 ------------- 11x=154 x=14
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