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Mary and Peter had a total of Rs 480.After Peter spent Rs 20, he had 3 times as much as Mary.How much did Mary have?

  • math - ,

    Let the original amounts be M and P.
    M + P = 480
    P - 20 = 3 M
    Subtract the second equation from the first.
    M + 20 = 480 - 3 M
    4 M = 460
    M = 115 rupees
    P = 365

  • math - ,

    480-20=460

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