There are two digits in a number .Their sum is 9.If 27 is added to the number ,its digits get interchanged .Find the number
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Let us the consider the number be xy
i.e., 10x+y
Given x+y=10 and 10y+x-27=10x+y
x+y=9 and y-x=9
by adding the above 2 equations, 2y=12
Therefore y=6 and x=3
The number=36.
i.e., 10x+y
Given x+y=10 and 10y+x-27=10x+y
x+y=9 and y-x=9
by adding the above 2 equations, 2y=12
Therefore y=6 and x=3
The number=36.
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