In a subtraction formula, the sum of the subtracted, the subtracted and the difference is 280. It is known that the difference is 3 / 5 of the subtracted. How much is the difference!

You can think of the subtracted as 1, the difference as 3 / 5, and the subtraction as 2 / 5
280÷（1＋3／5＋2／5）＝140
Subtracted = 140 × 1 = 140
Subtraction = 140 × 2 / 5 = 56
Difference = 140 × 3 / 5 = 84

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