Question

plzz answer itt plzzzz ​

Answer 1

Answer:

the number=78

Step-by-step explanation:

Let tens digit=x and one's is=y

sum of digits=x+y=15-----------------(1)

then no=10x+y

on interchanging digits the no become

=x+10y

as per given,New No is 9 more than actual no

So x+10y=10x+y+9

9x-9y=-9

x-y=-1---------------------(2)

adding (1) and (2)

2x=14

x=7

hence ten's digit=7

one's digit=15-7=8

So the number=78