Question

The sum of two digit number and the number obtained by reversing the order of 8 digit is 88 expressed this information in linear equations

Answer 1

Given units digit is x and tens digit is y

Hence the two digit number = 10y + x

Number obtained by reversing the digits = 10x + y

Given that sum of a two digit number and the number obtained by reversing the order of its digits is 121.

Hence (10y + x) + (10x + y) = 121

⇒ 11x + 11y = 121

∴ x + y = 11

Thus the required linear equation is x + y = 11.