### Home > A2C > Chapter 12 > Lesson 12.5.2 > Problem 12-211

12-211.

The sum of the digits of a two-digit number is

If you use

to represent the tens digit, andto represent the units digit, how can you represent one of the numbers?How can you represent the number with its digits reversed, still using

and?See part (a). What effect does reversing the digits have?

Use the information from the problem and parts (a) and (b) to write two equations that can be used to solve this problem.

How do you write an equation to find the sum of the digits?

How do you write an equation to find the difference of the numbers?What are the two numbers?