Step-by-step explanation:

Let the number be xy, where y is at unit's place and x is at ten's place.

2x = y

2x-y = 0

Interchange the digits = yx

new number = 10y+x

original number = 10x+y

(10x+y) + 36 = 10y+x

9x-9y+36 = 0

x - y + 4 = 0

solving these two equations, you will get the values of x and y

x = 4, y = 8

Thus the number is 48

mark as brainliast

follow me