要求:列方程解答(只含X)或算术法解答.要求有计算过程,而且带以讲解,会有追加分.1.货车和客车分别从相距460.5千米的甲乙两地同时相向而行.经过4.5小时两车相距0.0195千米.已知货车每小

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