A no. consists of two digits whose sum is 5 . if 9 is subtracted from the no. the digit interchange their places. find the no.
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Let the digits be x and y.
The number will be 10x+y.
x+y=5
A/q,
10x+y-9=10y+x
9x-9y=9
x-y=1
Now,
x+y=5
x-y=1
On solving the equations we get,
x=3 and y=2.
Therefore the no. is 32
The number will be 10x+y.
x+y=5
A/q,
10x+y-9=10y+x
9x-9y=9
x-y=1
Now,
x+y=5
x-y=1
On solving the equations we get,
x=3 and y=2.
Therefore the no. is 32
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