This type of question begins with a value given(usually the difference between 2 parties).
Each of the value undergo fractional decrease and both ends up to be equal in the end.
Such questions are common in Paper 2 of P5 and P6 Math exams.
Calculator usage is allowed.
Rachel has $105 more than Phoebe at first.
After Rachel spent 2/3 of her money and Phoebe spent 1/4 of her money,
both girls have equal amount of money left.
How much did Rachel spend?

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