Question
Riordan has some money to buy some pens. He will have $6 if he buys 7 pens. However, he will need $4 more if he wants to buy 12 pens. How much money does each pen cost?
4 m

Click button first when a symbol is required. X

Riordan has some money to buy some pens. He will have $6 if he buys 7 pens. However, he will need $4 more if he wants to buy 12 pens. How much money does each pen cost?