英语翻译

问题描述:

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

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...