If it were two hours later, it would be half as long until midnight as it would be if it were an hour later. What time is it now

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问题 If it were two hours later, it would be half as long until midnight as it would be if it were an hour later. What time is it now?

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答案0.875

解析 设现在时间为X,根据题中的时间倍数关系,可列出2×[24-(X+2)]=24-(X+1),解得X=21,所以时间是21点。
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