At a particular music store, cds are on sale at $14.00 for the first one purchased and $12.00 for each additional disc purchased. maria spends $86.00 on cds. how many cds has maria purchased?

To calculate the answer, we subtract $ 14 from the first CD to the total amount spent, which is $ 86.
 So:
 $ 86- $ 14 = 72
 The rest of the CDs cost $ 12.
 Then we divide $ 72 between $ 12
 $ 72 / $ 12 = 6.
 That means that 6 CDs were bought at $ 12 plus the first one bought at $ 14.
 So the number of CDs that María bought was 7

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