Question

The difference between the digits of two-digit number is 4. If four times
the number is equal to seven times the number obtained by reversing the digits,
find the number

Answer 1

Step-by-step explanation:

let the tens place digit of number be x and ones place digit be y

then original number is 10x +y

aq /to question

4×(10x+y)=7(10y+x)

40x+4y=70y+7x

33x=66y

x=2y

now x-y=4

2y-y=4

y=4

x=8 hence number is 84