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math

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mary's age is (2\3) that of peter's .two years ago mary's age was (1\2) of what peter's age will be in 5 years time .how old is peter now?

  • math - ,

    Let M and P be their ages now.
    M = (2/3) P
    M - 2 = (P+5) /2
    Now, rearrange the last equation.
    2M - 4 = P + 5
    2M - P = 9
    4M - 2P = 18
    From the first equation,
    3M - 2P = 0

    Subtract the last equation from the one before it.

    M = 18
    P = 27

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