问题描述：
某商店原有“美的”、“格力”、“海尔”空调三种空调,其中“美的”空调比“格力”空调多三分之一,“海尔”空调比“格力”空调少二分之一,后来商店有购进了“美的”空调100台,购进了“格力”空调160台,这是“美的”与“格力”空调占空调总数的十分之九,问商店原有空调多少台?
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问题解答：
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