Question

Example
A two digit number is such that the product of its digit is 15. If 18 is added to the number, the digits
interchange their places. Find the number,​

Answer 1

Step-by-step explanation:

HI DEAR,

LET THE NUMBER BE 10x+y

so, 10x+y+18 = 10y+x.....

10x+y+18-10y-x=0

9x-9y= -18

y-x = 2

y =2+x...

xy =15

(2+x)x =15

x²+2x-15 =0

x=-5 or 3

y = -3 or 5

POSSIBLE ORIGINAL NUMBER..

-53 OR 35

HOPE IT HELPS...