if 2/3 is 1/2 of 4/5 of a certain number, then that number is:
怎么列式啊
人气：317 ℃ 时间：2019-10-09 12:26:15
解答
设a certain number是x,那么它的4/5的1/2就为x*4/5*1/2=2/3
解得x=5/3
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