3 books + 4 pens = $43.70
1 book + 1 pen = $13.80 x3 x3 x3
3 book + 3 pen → $13.80 x 3 = $41.40
3 books + 4 pens = $43.70 3 books + 3 pens = $41.40
1 pen = 43.70 - 41.40
= $2.30
Question 2
Video explanation ↓Belinda bought 3 identical books and 4 identical pens for $43.70. The total cost of a book and a pen is $13.80. How much does each pen cost? (2 marks)
Answer: $ 2.30