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設這個數是x 5分之1x-70*40%=2 5分之1x-28=2 5分之1x=30 x=150 這個數是150 很高興為您解答,祝你學習進步!【the1900】團隊為您答題. 有不明白的可以追問!如果您認可我的回答. 請點擊下麵的【選為滿意回答】按鈕,謝謝!
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