Ben has $10. Bobby has $4
k more than Ben. Lui has $2
k less than Bobby.
- Find the amount of money that Lui has in terms of k.
- Find the total amount of money that the three boys have in terms of k.
- If k = 7, how much does Lui have?
(a)
Amount that Ben has = $10
Amount that Bobby has = $(10 + 4
k)
Amount that Lui has
= 10 + 4
k - 2
k = $(10 + 2
k)
(b)
Total amount that the three boys have
= 10 + 10 + 4
k + 10 + 2
k= 10 + 10 + 10 + 4
k + 2
k = $(30 + 6
k)
(c)
Amount that Lui has
= 10 + 2
k= 10 + 2 x 7
= 10 + 14
= $24
Answer(s): (a) $(10 + 2
k) or $(2
k + 10); (b) $(30 + 6
k) or $(6
k + 30); (c) $24