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math

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during a recent telethon people pledged $25 or $50. twice as many people pledged $25 as $50. altogether, $18000 was pledged. how many people pledged $25?

  • math -

    Let x = # pledging $25 and Y = # pledging $50.

    x = 2y

    25x + 50y = 18000

    Substitute 2y for x in the second equation to solve for y. Put that value in the first equation to find x. Check by putting both values into the second equation.

  • math -

    X=360 ppl y=180 ppl

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