Question

find the original number ​

Answer 1

Answer:

x-y=3

and no. is 10x+y

when we reverse this

10y+x

and we add both

10x+y+10y+x=121

11x+11y=121

x+y=11

so we can say x+y=11

and x-y=3

then we solve both equation

and x=7 and y=4