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In a subtraction formula, the sum of the subtracted, the subtracted and the difference is 120, and the difference is three times of the subtracted. Then how much is the difference? The solution of the equation
From the meaning of the title:
Subtracted - subtracted = difference
Namely:
Subtracted = subtracted + difference = 120 △ 2 = 60
Because: the difference is three times the subtraction,
So: difference = 60 △ (3 + 1) × 3 = 45
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