Question

7 time a two digit number is equal to 4 times the number obtained by reversing the order of its digit. if the difference of the digit is 3, determine the number

Answer 1

Seven times a given two digit number is equal to four times the number obtained by inter changing the digits
7(10x+y)=4(x+10y)
70x+7y=4x+40y
66x-33y=0
2x-y=0
2x=y
The difference of the digits is 3
y-x=3
2x-x=3
x=3
y=6
that number is 36.
Hope this helps you !!