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閱讀快車系列答案科目：小學數學 來源：不詳 題型：解答題
| 解方程． 20x=70 | 55%x-25%=15 | 135-x+20=120 | x-3.6%=1.28 |
| 10x+25=100 | 32x+18x=120 | x-60%x=18 | 40%x+30=80． |
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