Question

One of the two digits of a two-digit number is twice the other digit.If you interchange the digit of
their two digit number and add the resulting number to the original number, you get 99.What is the
original number?​

Answer 1

Answer:

The answer is 18 .It is absolutely accurate answer.

Answer 2

Step-by-step explanation:

let the no be 10x+y

y=2x

10x+y+10y+x = 11x+11y = 11(x+y)

11(x+y) = 99

x+y = 9

substitute y = 2x

x+2x=3x=9

x=3

y=6

so the no. is 36 or 63