好的给40王老师在这次利率调整前有一笔一年期定期存款,到期时按调整前的年利率2.52%计息,本金与实得利息和为20504

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    X +2 Y = K(1)

    2X +3 Y = 3K-1(2)

    (2) - (1)

    X + Y = 2K - 1

    X + Y =

    6 = 2K-1

    K = 7/2.

    3倍+5?= M +2(1)

    2X +3 Y = M(2)

    (1) - (2)

    a>

    X +2 Y = 2

    X + Y = 2

    Y = 0,x = 2时,

    M = 2X +3?= 4.