Magical calculation

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Today I tell you through Magical calculation how many brothers and sisters you have ...

1- Take the number of brothers first! 
2- Add 2 in it now! 
3- Multiply the answer by 2! 
4- Add 1 in it now! 
5- Multiply the answer by 5! 
6- Find the number of sisters in that answer! 7- Now subtract 25 from the next answer!
8- Now you get the double digit number.

The first number is the brother and the second number is the number of sisters.

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