Stephen buys x pencils and y notebooks for his students. Each pencil costs $0.45 and each notebook costs $1.25. He buys a total of 210 pencils and note books for 142.50$. How many pencils did Stephen buy?

Answer:
Stephen bought 96 pencils.
Explanation: 142.50 divided by 1.25 equals 114. 210-114= 96. Hope this helps :)