Question

the sum of the digit of a two digit number is 9. if the digits are reversed, the number is 63 more than the original. find the number​

Answer 1

Step-by-step explanation:

no is 18

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Answer 2

Step-by-step explanation:

let the no.s be x & y

so x + y = 9

now, if the no. are reversed

then it is 63 more than the original

so

x + y = 9

10y + x

so

10y+x = 10x +y

9x-9y=0

now

9x-9y = 0

x+y =9

so,

x = 9- y

now

9(9-y) -9y =0

81-9y -9y =0

81-18y =0

81=18y

81/18 = y

y= 4.5

now

x+y=9

4.5+x =9

x = 9-4.5

x = 4.5