Hong bought 60 CDs that were each the same price. Including sales tax, he paid a total of $100.80. Of that total, $6.60 was tax. What was the price of each CD before tax?

$1.57 per CD

Step-by-step explanation:

Subtract the tax from the total then divide by the number of CDs.

100.80-6.60=94.2

94.2/60=1.57

x = -4

step-by-step explanation:

- 20 - 4(x + 3) = 4x

=> -20 - 4x - 12 = 4x

=> - 32 -4x = 4x

=> -32 = 4x + 4x

=> - 32 = 8x

=> -32/8 = x

=> -4 = x