Question

A two digit number and the number with digits interchanged add up to
143. In the given number the digit in unit's place is 3 more than the
digit in the ten's place. Find the original number.​

Answer 1

let 2digit no. be 10x+y

A two digit number and the number with digits interchanged add up to 143

=> x+y =143÷11=13

and given y=x+3

y-x = 3 ---A

y+x =13 ----B

y= 8

x=5

no. is 10*5+8 =58