Joe buys 9 cds for the same price, he also buys a dvd for 20. His total bill is 119. Find the cost o

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Joe buys 9 cds for the same price, he also buys a dvd for 20. His total bill is 119. Find the cost of one cd.

Let c be the cost of one CD. Set up the equation:
9c + 20 = 119

Use the equation solver:
c = 11