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Mr and Mrs Lim went shopping with a total of $712.50. After buying some items each, the amount Mrs Lim had left was 4 times the amount she spent and the amount Mr Lim had left was trice the amount he spent. Both of them had a total of $555 left, how much did each of them have at first?

  • Maths -

    Try setting up the algebraic equations and solving them. Let the starting amounts be x for Mr Lim and y for Mrs Lim.

    x + y = 712.50

    1/5 of x was spent
    1/3 of y was spent

    (4/5) x + (2/3) y = 555

    Solve the two equations in two unknowns.

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