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Let the unit digit be x
then tens digit will be x+5
In a two digit number, the form will be, 10(x+5)+x......
reverse form= 10x+x+5
their difference=45
10x+50+x-(10x+x+5)=45
sum. of their digits=9
x+x+5=9
2x=4
x=2
x+5=7
the number is 27 and 72
then tens digit will be x+5
In a two digit number, the form will be, 10(x+5)+x......
reverse form= 10x+x+5
their difference=45
10x+50+x-(10x+x+5)=45
sum. of their digits=9
x+x+5=9
2x=4
x=2
x+5=7
the number is 27 and 72
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