列方程解答下面各题1.购进大米450千克,吃了x千克,还剩150千克.2.旗鱼是游速最快的鱼类,一条旗鱼游速可达120千米/时,是一只海豚的2.4倍.一只海豚每小时可游多少千米?3.某市居民用水价格为每
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![列方程解答下面各题1.购进大米450千克,吃了x千克,还剩150千克.2.旗鱼是游速最快的鱼类,一条旗鱼游速可达120千米/时,是一只海豚的2.4倍.一只海豚每小时可游多少千米?3.某市居民用水价格为每](/uploads/image/z/1249211-11-1.jpg?t=%E5%88%97%E6%96%B9%E7%A8%8B%E8%A7%A3%E7%AD%94%E4%B8%8B%E9%9D%A2%E5%90%84%E9%A2%981.%E8%B4%AD%E8%BF%9B%E5%A4%A7%E7%B1%B3450%E5%8D%83%E5%85%8B%2C%E5%90%83%E4%BA%86x%E5%8D%83%E5%85%8B%2C%E8%BF%98%E5%89%A9150%E5%8D%83%E5%85%8B.2.%E6%97%97%E9%B1%BC%E6%98%AF%E6%B8%B8%E9%80%9F%E6%9C%80%E5%BF%AB%E7%9A%84%E9%B1%BC%E7%B1%BB%2C%E4%B8%80%E6%9D%A1%E6%97%97%E9%B1%BC%E6%B8%B8%E9%80%9F%E5%8F%AF%E8%BE%BE120%E5%8D%83%E7%B1%B3%2F%E6%97%B6%2C%E6%98%AF%E4%B8%80%E5%8F%AA%E6%B5%B7%E8%B1%9A%E7%9A%842.4%E5%80%8D.%E4%B8%80%E5%8F%AA%E6%B5%B7%E8%B1%9A%E6%AF%8F%E5%B0%8F%E6%97%B6%E5%8F%AF%E6%B8%B8%E5%A4%9A%E5%B0%91%E5%8D%83%E7%B1%B3%3F3.%E6%9F%90%E5%B8%82%E5%B1%85%E6%B0%91%E7%94%A8%E6%B0%B4%E4%BB%B7%E6%A0%BC%E4%B8%BA%E6%AF%8F)
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