Question

sum of the two digits of a two digit number is 9 if the digits are reversed the new number so formed increased by 45 find the number​

Answer 1

Answer:

27

Step-by-step explanation:

let ten's digit is = x

and one's digit= y

then

numbers is = 10x+y

x+y = 9 -------------------1

if digit are reverse,

number is-

10x+y = 10y+x-45

9x-9y = -45

x- y = -5------------------------2

equation 1 and 2

2x= 4

x= 2

and

y= 7

number is = 10×2+7= 27