Question

7times a two digit number is equal to 4times the number
obtained by reversing the order of its digits. If the difference
of the digits is 3. find the digits​

Answer 1

Answer:

36

Step-by-step explanation:

Let the unit digit be x and tenth digit be y

So the number be = 10y + x

No on reversing =10x + y

By the Question

7(10y + x) = 4( 10x + y)

70y +7x = 40x +4y

70y - 4y = 40x - 7x

66y = 33x

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

x - y =3 ------> (2)

solving equation 1 and 2

2y - y = 3

y = 3

x = 2× 3 = 6

So the number = 10× 3 + 6

= 36