Question

A number of two digits has the some of its digits 7. When 9 is subtracted from the number, digits are reversed. The number is-
A) 43
B) 34
C) 36
D) 63​

Answer 1

Step-by-step explanation:

$\Huge\red{\mathfrak{ Answer }}$

Sum= 7

let unit digit be x

then tens digit = 7-x

When 9 is subtracted we have

number formed will be 10(7-x)+x= 70-10x-x= 70-9x

After subtracting 9 we get

70-9x-9= Reversed number

Reversed number will be 10x+7-x= 9x+7

A/Q.

70-9x-9= 9x+7

=> 61-9x= 9x+7

=>9x+7= 61-9x

=> 9x+9x= 61-7

=>18x= 54

=>x= 54/18

=>x = 3

Unit digit = 3

tens digit = 7-3= 4

Number formed = 43

hope it helps ✌

Answer 2

Answer:

number formed are 43

I hope it is correct answer follow me Mark as brainlist answer