the sum of digit of a two digit number is 12.if 18 is added to the number the digit inter change their places.find the number
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the no. is either 57 or 75
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x+y=12 ...................................Eqn 1
Let the number be 10x+y
Then,
10x+y+18=10y+x
=>9x-9y=(-18)
=>x-y=(-2)................................Eqn 2
Now add eqn 1&2
You wil get the answer
Thank you and thank me if you have understood it.
Let the number be 10x+y
Then,
10x+y+18=10y+x
=>9x-9y=(-18)
=>x-y=(-2)................................Eqn 2
Now add eqn 1&2
You wil get the answer
Thank you and thank me if you have understood it.
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