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Math Help - word problem

  1. #1
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    word problem

    1. A cd player costs $10 more than twice the cost of a radio. If a radio costs $25, what is the cost of a Cd player

    2. If a radio $31, what is the cost of a CDplayer?

    3. Write an equation using the prices of the cd player and radio.Use c for the price of the cd player. Use r for the price of the radio.
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  2. #2
    Grand Panjandrum
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    Quote Originally Posted by star29867 View Post
    1. A cd player costs $10 more than twice the cost of a radio. If a radio costs $25, what is the cost of a Cd player
    let C be the price of the cd player in dollars and R the price of a radio in
    dollars. You are told that:

    C=2R+10,

    and that R=25,

    so:

    C=60

    so the cd player costs $60.

    2. If a radio $31, what is the cost of a CDplayer?

    3. Write an equation using the prices of the cd player and radio.Use c for the price of the cd player. Use r for the price of the radio.

    These should be obvious now.

    RonL
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