if 2/3 is 1/2 of 4/5 of a certain number, then that number is:怎么列式啊
问题描述：
if 2/3 is 1/2 of 4/5 of a certain number, then that number is:
怎么列式啊
答
we can suppose that the number is “x”
there's“x*4/5*1/2=2/3 ”
then we get “x” is “5/3”
答
that number is:
10/3
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