Question

In a 2 digit number, the units place digit is x. If the sum of digit be 9 then the number is( 10x-9) . Is it True or false and why​

Answer 1

Explanation:

Given : x= unit's place in a two digit number

Let  y= ten's digit in the number.

Then the representation of two digit number = 10y+x   (i)

If the sum of digits be 9 , then x+y=9

Then, y= 9-x

Put this value in (i ) , we get

Two digit number =10(9-x)+x

= 90-10x+x

= 90-9x

= 9(10-x) ≠ (10x-9)

Hence, the given statement is false.

PLEASE MARK BRAINIEST

Answer 2

Answer:

Step-by-step explanation:

Unit's digit is x

Sum of digit is 9 .

Tens digit will be 9-x.

Number = 10(9-x) + x

90-10x + x

90-9x

9(10-x)

Hence it is false.