Question
Box N and Box P contained a total of 75 pens. After 12 pens were transferred from Box N to B, Box P contained four times as many pens as Box N. How many pens were there in Box N at first?
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Box N and Box P contained a total of 75 pens. After 12 pens were transferred from Box N to B, Box P contained four times as many pens as Box N. How many pens were there in Box N at first?