Please and any one of the sums ☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️
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let x and y be two digits and 10x+y be the number
then 4(10x+ y)=7(10y + x)
40x+4y=70y+7x
40x-7x+4y-70y=0
33x -66y=0
x-2y=0
It is given x-y=4
x-y-(x-2y)=4-0
y=4
x-4=4
x=8
The number is 84 Ans
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