Question

a no consist of two digit whose sum is 9 if 27 is added to the no the digits are reserved. find the no.plz find this question fast because tomorrow is my exam of it pz

Answer 1

Hey

Here is your answer,


Let x and y be the 2 digits of the number.
(x be the tens place digit and y be the units place digit)
The number is : 10x + y

Given : Sum of 2 digits = 9
Hence, x + y = 9 .................. (1)

By The second condition of 27 being subtracted from the number,

10x + y -27 = 10y + x
9x-9y = 27

x - y = 3 .......................... (2)

Solve equations (1) and (2) Simultaneously

x + y = 9
x - y = 3
___________
2x = 12

x=6
y=3

The number is 10x + y ,
i.e 10 x 6 + 3 = 63

Hope it helps you!