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標題:
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發問:
A number is increase by 35%. Da new number is larger than da original number by 28. Find da original number
最佳解答:
Let that number is Y Y x ( 1 + 35%) = Y + 28 => 1.35 Y = Y + 28 => 0.35 Y = 28 => Y = 28/0.35 => Y = 80
其他解答:
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Let the number is X X ( 1 + 35%) = X + 28 之後()裡面要計先 1.35 X = X + 28 把X調過去... 0.35 X = 28 X = 28÷0.35 X = 80 SO....the answer is 80
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