Question

the sum of two dight of two dight number is 15. the number obtained by interchanging it's dight exceed the given number by 9. find number​

Answer 1

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Solution. Let the tens and the units digits of the required number be x and y, respectively. Hence, the required number is 78.

Answer 2

Answer:

Number =78

Step-by-step explanation:

Let the ones digit be x

Let the tens digit be y

Number=10y+x

Atq, x+y=15

Number by reversing the previous one =10x+y

10x+y=10y+x+9

9x-9y=9

X-y=1

X+y=15

X=8

Y=7