Question

The Sum Of Digits Of 2-Digit Number Is 7 . If The Digits Are Reversed The Number Formed Is 9 Less Than The Original Number . What Is Original Number?

Answer 1

Answer:

43

Step-by-step explanation:

let the number be ab=(10*a)+(1*b)

a+b=7

(10*a)+(1*b)-(10*b)-(1*a)=9

10(a-b)-(a-b)=9

(a-b)(10-1)=9

a-b=1

by solving a=4

b=3