In a subtraction formula, the sum of the subtracted, the subtracted and the difference is 120, and the difference is three times that of the subtracted. What is the difference

Subtracted - subtracted = difference, so difference + subtracted = subtracted
The sum of these three numbers is 120, which can be interpreted as two subtracted numbers of 120
Then the subtracted is 60. The sum of difference and subtraction is 60
The difference is three times of the subtraction. If the subtraction is regarded as one, then the difference is three, and the difference + subtraction is four
60÷4＝15
So the subtraction is 15, and the final difference is three times the subtraction. The difference is 3 × 15 = 45

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