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Math Help - [SOLVED] Word Problem

  1. #1
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    [SOLVED] Word Problem

    A school ordered $600 worth of lightbulb. Some of the lightbulbs cost $1 and the others cost $2 each. If twice as many $1 bulbs as $2 bulbs were ordered, how many lightbulbs were ordered altogether?

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    Page 598 #13
    Last edited by fabxx; September 25th 2008 at 10:56 PM.
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  2. #2
    Newbie kirbyiwaki's Avatar
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    1) 600=2x+y
    2) y=2x
    then, on 1...
    600-2x=2x
    600=4x
    x=600/4
    x=150
    then on 2:
    y=2(150)
    y=300

    so, total bulbs:
    x+y=300+150
    x+y=450
    Last edited by kirbyiwaki; September 25th 2008 at 10:51 PM. Reason: made a mistake ^^"
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  3. #3
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    Thanks for replying but the correct answer is 450.
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  4. #4
    Newbie kirbyiwaki's Avatar
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    lol, yeah, I just saw my mistake... sorry about that ^^"
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