Fred saved $9 each day and Gwen saved $
e more than Fred each day. After 3 weeks, they were still short of $31 to buy a television set.
- How much did the television set cost? Express your answer in terms of e.
- If e = $7, how much did the television set cost?
(a)
Amount Fred saved per day = $9
Amount Gwen saved per day = $(9 +
e)
Total amount both saved per day
= 9 + 9 +
e = $(18 +
e)
Number of days in 3 weeks
= 3 x 7
= 21
Total both saved in 3 weeks
= 21(18 +
e)
= 21 x 18 + 21 x
e = $(378 + 21
e)
Cost of the television set
= 378 + 21
e + 31
= 378 + 31 + 21
e= $(409 + 21
e)
(b)
If
e = $7,
Cost of the television set
= 409 + 21 x 7
= 409 + 147
= $556
Answer(s): (a) $(409 + 21
e) or $(21
e + 409); (b) $556
