Mrs Lui paid a total of $39 for 3
t pencils and 4 notebooks. Each pencil cost $2.
- Express the cost of 1 notebook in terms of t.
- If t = 3, how much did each notebook cost?
(a)
Total amount spent on 3
t pencils
= 3
t x 2
= $6
t Total amount spent on 4 notebooks = $(39 - 6
t)
Total amount spent on 1 notebook = $(
39 - 6t4)
(b)
Price of each notebook if
t = 3
= (39 - 6 x 3) ÷ 4
= (39 - 18) ÷ 4
= 21 ÷ 4
= $5.25
Answer(s): (a) $(
39 - 6t4) or $
39 - 6t4; (b) $5.25