Question

A number consists of two digits whose sum is 9 with the digits are reversed the number is 3 by 8 of the first number find the number

Answer 1

Answer:

72

Step-by-step explanation:

Assume 1st digit x

Assume 2nd digit y

x + y = 9

ist number = 10x + y

2nd number = 10y + x

10y + x = (3/8 )* (10x + y )

80y + 8x = 30 x + 3y

77y = 22 x

7y = 2x

x = 3.5 y

3.5 y + y = 9

so y = 2

x =7

first number =72

second number = 27