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Math Help - world problem

  1. #1
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    world problem

    1. A tv costs $30 less than twice the cost of a VCR. If a VCR costs $120, what is the cost of a TV?
    2.If a TV costs $150 , what is the cost of a VCR?
    3. Write an equation using the prices of the VCR and TV. Use v for the price of the VCR. Use t for the price of the TV.
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  2. #2
    Grand Panjandrum
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    Quote Originally Posted by star29867 View Post
    1. A tv costs $30 less than twice the cost of a VCR. If a VCR costs $120, what is the cost of a TV?
    2.If a TV costs $150 , what is the cost of a VCR?
    3. Write an equation using the prices of the VCR and TV. Use v for the price of the VCR. Use t for the price of the TV.
    Do the last part first:

    t=2v-30.

    Now the rest is obvious, just substitute in the given values of v for the
    first, and for the second rearrange the equation to:

    v=(t+30)/2.

    RonL
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