a number consists of two digits whose sum is 9. if 27 is subtracted from the number its digits are reversed. find the number
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Answer:
Number is: 63
..Solution in the attachment.
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Step-by-step explanation:
Let the no at unit place be x and at tens place be y
therefore no =10y +x
acc to first con
x+y=9. .......(1)
second cond
10y+x-27=10x +y
10y-y =10x-x+27
9y=9x +27 divide by 9
y=x+3
y-x=3......(2)
adding (1) and (2) we get
2y =12
hence y =6
substitute it in 1
x+y =9
x+6=9
hence x=3
the no =10y + x
=10 X 6 + 3
=63
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