Math..please help!

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?

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

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    2. 👎
  2. 360 people pledged $25-9,000
    180 people pledged $50 - 9,000

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