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Hong bought 4 CDs that were each the same price.
Including sales tax, he paid a total of $55.60.
Each CD had a tax of $1.10. What was the price of each CD before tax?
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One line solution:
The price of each CD before tax = = 12.80. ANSWER
Solved.
It is so obvious and so clear, as 2 x 2 = 4, and, THEREFORE, does not require more detailed explanations.