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Form the pair of linear equations in the...

Form the pair of linear equations in the following problems, and find their solutions (if they exist) by the elimination method :
Meena went to a bank to withdraw Rs. 2000. She asked the cashier to give her Rs. 50 and Rs. 100 notes only. Meena got 25 nots. in all. find how many notes of Rs. 50 and Rs. 100 she received.

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