Question

In a two digit number ,theone digit is 3 times the ten's digit.if 10 is added to the 2 times of the number its digits inter change their places in the new number Find the number

Answer 1

Answer:

26

Step-by-step explanation:

let say number = 10x +y

y = 3x

2*(10x+y) +10 = 10y +x

put y =3x

2*(10x+3x) +10 = 10*3x + x

2*13x + 10 = 30x + x

10 = 31x -26x

5x = 10

x =2

y = 3*2 =6

number = 26