英语翻译The most she could of fixed was twice on the same wheel.

英语翻译
The most she could of fixed was twice on the same wheel.What is the most possible new wheel on car when Jean brought it.
原文：Jean bought a car with 18 wheels.Some wheels were new and some were old.Jean had to fix flat tires.She fixed a total of 8 wheels.All of the wheels she fixed were old wheels.The most she could of fixed was twice on the same wheel.What is the most possible new wheel on car when Jean brought it.(I don't understand the question)

这句话的意思是：她最多可能重复在同一个轮胎上修两次,那么当Jean买到这辆车的时候车上最后会有几个新轮胎.（最后那个应该是bought而不是brought）
这样计算：一共18个轮胎,她修过8个,如果要想新轮胎最多,那么就假设她每个旧轮胎都修了两次,也就是说只有4个旧轮胎,最后的结论是最后可能有18-4=14个新轮胎.

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