A is a natural number .if A subtracts 1,3,5...(some continou

A is a natural number .if A subtracts 1,3,5...(some continou If 1/5 of a number is 12,What is 3/10 of the same number? 英语翻译1、if there is a mapping of the natural numbers onto a se if 3 times a less than a number n is the same as the number If 120 is three tenths of a number,the number If “a” is a positive number less than 1 and b= 根号a ,then a（ if 2/3 is 1/2 of 4/5 of a certain number, then that number i 英语翻译If 3 times 1 less than a number n is the same as twice t 英语翻译If the tenderer is a natural person,a document received if 3 more than twice a number is equal 10,what is the 4 time if a certain number is 3 more than 7 times itself if 4 less than 3 times a certain number is 2 more than the n