NCERT Exercise 3.3 - Q2(iii) - Pair of Linear Equations in Two Variables
Question: Form the pair of linear equations in the following problems, and find their solutions (if they exist) by the elimination method: (iii) The sum of the digits of a two-digit number is 9. Also, nine times this number is twice the number obtained by reversing the order of the digits. Find the number.
Answer: The number is 18.
Full step-by-step NCERT solution with diagrams on Something by Zero.