Problem: a certain store sold pens for $ 0.35 each and pencils for $ 0.25 each . if a customer purchased both pens and pencils from the store for a total of $ 2.00 , what total number of pens and pencils did the customer purchase ?
Rationale: "answer : aalgebraically , the question looks like this : 2.5 = 0.35 x + 0.25 ythere are six possible numbers of pens that fit that requirement : 1 pen : $ 0.35 2 pens : $ 0.70 3 pens : $ 1.05 4 pens : $ 1.40 5 pens : $ 1.75 and 1 pencils for $ 0.25 each . that ' s 5 pens and 1 pencils for a total of 6 pens and pencils . choice ( a ) is correct ."
annotated_formula: multiply(divide(2.00, add(0.35, 0.25)), const_2)