Question

In a two digit number, the units place digit is x. If the sum of the digits be 9,then find the number.
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Answer 1

Answer:

If the sum of digit be 9 then the number is( 10x-9) .

Answer 2

Answer:

unit digit =x

let tens digit be=y

number will be=10y+x

given that x+y=9

x=9-y

so number will be

10y + 9-y

9y+9