SOLUTION: Kenny paid $120 for 4 cds and 3 dvds. Each dvd cost $12 more than a cd. what was the cost of three dvds?

Question 769353: Kenny paid $120 for 4 cds and 3 dvds. Each dvd cost $12 more than a cd. what was the cost of three dvds?
Answer by Jc0110(165) (Show Source): You can put this solution on YOUR website!
Let the cost of 1 CD to be x whereas the cost of 1 DVD to be y.
---> Equation 1
---> Equation 2 ... Substitute into Equation 1

... Substitute into Equation 1

---> 3y is made as the subject of the equation because the cost of 1 DVD is y, thus the cost of 3 DVDs is 3y.

Thus, the cost of 3 DVDs is $72.
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