Pierre saved $8 each day and Abi saved $
x more than Pierre each day. After 2 weeks, they were still short of $30 to buy a laptop.
- How much did the laptop cost? Express your answer in terms of x.
- If x = $20, how much did the laptop cost?
(a)
Amount Pierre saved per day = $8
Amount Abi saved per day = $(8 +
x)
Total amount both saved per day
= 8 + 8 +
x = $(16 +
x)
Number of days in 2 weeks
= 2 x 7
= 14
Total both saved in 2 weeks
= 14(16 +
x)
= 14 x 16 + 14 x
x = $(224 + 14
x)
Cost of the laptop
= 224 + 14
x + 30
= 224 + 30 + 14
x= $(254 + 14
x)
(b)
If
x = $20,
Cost of the laptop
= 254 + 14 x 20
= 254 + 280
= $534
Answer(s): (a) $(254 + 14
x) or $(14
x + 254); (b) $534
