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

Question

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

anonymous · Answer

3x+5y=137
2x+7y=161
x..CD and y..DVD

anonymous · Answer

21x+35y=959
10x+35y=805
-------------
11x=154
x=14