Question

The sum of the digits of a two-digit number is 13. If the digits are interchanged, and the resulting number
is added to the original number, then we get 143. What is the original number?
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Answer 1

Step-by-step explanation:

first

10(13-x)+x

now solve the equation

now new no is

9x-13

now you got the equation

130x-9x+9x-13=143 now you can solve this