Question
Packet N and Packet P contained a total of 39 buttons. After 35 buttons were transferred from Packet N to B, Packet P contained twice as many buttons as Packet N. How many buttons were there in Packet N at first?
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Packet N and Packet P contained a total of 39 buttons. After 35 buttons were transferred from Packet N to B, Packet P contained twice as many buttons as Packet N. How many buttons were there in Packet N at first?