Question

Plz Plz Plz plz plz tell fast​

Answer 1

Step-by-step explanation:

let the numbers be x,y

given that

x-y=3......................eq1

the original number is =10x+y

if they are interchanged=10y+x

they tell that the original number+interchanged=121

10x+y+10y+x=121

11x+11y=121

11(x+y)=121

x+y=11...............eq2

add eq1+eq2

2x=14

x=7

subtract eq2-eq1

y=4

then original number=10x+y=70+4=74