Question: Eric has rock and classical MP^(3)s on his computer. The number of rock MP^(3)s is 3 times more than the number of classical MP^(3)s. Let

Eric has rock and classical MP^(3)s on his computer. The number of rock MP^(3)s is 3 times more than the number of classical MP^(3)s. Let c represent the number of classical MP^(3)s. Write an expression for the number of rock MP^(3)s.

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