Question

7 times of a two digit number equals 4 times the number with digit reversed. Find the number if the sum of its digit is 3?​

Answer 1

Answer:

let X+y=3-------eq(1)

Step-by-step explanation:

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

70x+7y=40y+4x

70x-4x=40y-7y

66x=33y

2x=y--------eq(2)

substitute eq(2)ineq(1)

X+y=3

X+2x=3

3x=3

X=1

y=2

therefore original number is 12