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数学7上：慢车先开1小时，快车再开，求快车开出多久两车相遇？
数学7上：慢车先开1小时，快车再开，求快车开出多久两车相遇？
七年级数学，一元一次方程应用题，各种类别的题型，这里都有详解176/581
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