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OpenStudy (anonymous):
Sarah went to an electronic 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?
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OpenStudy (anonymous):
$13 $14 $18 $19
OpenStudy (anonymous):
B is the answer
OpenStudy (anonymous):
3x + 5y = 137 2x + 7y = 161 6x + 10y = 274 -6x - 21y = -483 -11y = -209 y = 19 x = (274-190)/6 = 14 dollars
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