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 设现在的时间为X,根据题意可得下列方程式:24一(x+2)=1/2[24一(x+1)],得x=21,所以现在是21:00。
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