英语翻译in a two-digit number,the units digit is greater than the ten_数学解答

英语翻译
in a two-digit number,the units digit is greater than the tens digit by 3 If tens digit and the units digit of the number are interchanged,the sum of the number obtained and the original number is 121.FIND THE TWO NUMBERS

人气：139 ℃　时间：2020-02-02 22:37:29

解答

Suppose the tens digit is x,the units digit is x+3,the original number is x*10+(x+3),the obtained number is (x+3)*10+x;(x+3)*10+x+x*10+(x+3)=121,calculate x=4the original number is 47,the obtained num...