Question

The sum of a two digit number and the number obtained by reversing the order of its digits 121.If unit's and ten's digit of the number are x and y respectively ,then write the linear equation representing the above statement

Answer 1

unit digit = x

ten's digit = y

no. = 10y+x

no obtained by reversing the digit = 10x+y

according to condition,

10x+y+10y+x = 121

11x+11y = 121

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

Answer 2

unit digit = x

ten's digit = y

no. = 10y+x

no obtained by reversing the digit = 10x+y

according to condition,

10x+y+10y+x = 121

11x+11y = 121

x+y = 11. is the required linear equation