Question

Amy sold pens and pencils for a fundraiser at school. Pencils sold for $1.50, and pens sold for $2. She sold a total of 35 items and made $61.50. How many pens did Amy sell?

Answer 1

p + i =35
1.5 p + 2i = 61.50

1.5 (35-i) +2i =61.50
52.5 - 1.5i + 2i =61.50
.5i = 9.00
i = 18

So 18 pens where sold.