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Math..please help!

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During a recent telethon, people pledged $25 or $50. Twice as many people pledged $25 as $50. Altogether, $18,000 was pledged. How many people pledged $25?

  • Math..please help! - ,

    N*25+ N/2 *50=18000
    solve for N.

  • Math..please help! - ,

    360 people pledged $25-9,000
    180 people pledged $50 - 9,000

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