Question

plz answer fast plz it is urgent plz help me who answered all answers correctly iwill follow you definitely​

Answer 1

Step-by-step explanation:

19.

let the no. be 10x+y

x+y=12

10y+x-10x-y=18

9y-9x=18

y-x=2

2y=14

y=7

x=12-7

=5

so the no. is 57