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Palak.
Answers (1)
Let the cost of a pen and a pencil be x and y respectively. 4x+4y=100 x+y=25 ...(1) 3x=y+15 3x−y=15 ...(2) Adding (1) and (2), we get 4x=40 x=10 Substitute x=10 in equation (1) to get y=15.
