Question

the sum of the digit of a two digit number is 9. the number is 6 time the unit digit. find the number.​

Answer 1

Answer:

36

Step-by-step explanation:

x + y = 9.....(1)

10y+x=6x

x=2y.....(2)

x+y=9

2y+y=9

y=3

x=6

actual number =10(3)+6

=36

Answer 2

Step-by-step explanation:

Let the unit digit of the number be x

and 10 th place digit of the number be y

Therefore,

Number is 10y + x

So,

By the problem,

x + y = 9 -----------(i)

and

10y + x = 6x

=> 10y = 5x

=> x = 2y ---------------------(ii)

substitute x in equation (i), We get,

2y + y = 9

=> 3y = 9

=> y = 3

Now putting the value of y in equation (ii)

we get,

x = 6

So, the number is (10*3 + 6) = 36

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