Question

a number consists of two digits the digit at the tens place is twice that of the digit at units place if 18 is subtracted from the number the digits are reversed find the number.​

Answer 1

Answer:

The no. is 42.

Step-by-step explanation:

The no. consists of two digits.

Let the digits be x and y.

So, the no. is 10x + y.

According to the 1st condition,

x = 2y.........(1)

According to the 2nd condition,

10x + y - 18= 10y + x

10x+ y - 10y - x= 18

9x - 9y = 18 .............(2)

Substituting eqn (1)in eqn (2)

9(2y) - 9y = 18

18y - 9y = 18

9y = 18

y = 18÷ 9

y = 2

Substituting y= 2 in eqn (1)

x = 2y

x= 2 (2)

x = 4

Therefore the number is 42.

Plz mark as brainliest..