David has $13. Ahmad has $4
a more than David. Zane has $2
a less than Ahmad.
- Find the amount of money that Zane has in terms of a.
- Find the total amount of money that the three boys have in terms of a.
- If a = 5, how much does Zane have?
(a)
Amount that David has = $13
Amount that Ahmad has = $(13 + 4
a)
Amount that Zane has
= 13 + 4
a - 2
a = $(13 + 2
a)
(b)
Total amount that the three boys have
= 13 + 13 + 4
a + 13 + 2
a= 13 + 13 + 13 + 4
a + 2
a = $(39 + 6
a)
(c)
Amount that Zane has
= 13 + 2
a= 13 + 2 x 5
= 13 + 10
= $23
Answer(s): (a) $(13 + 2
a) or $(2
a + 13); (b) $(39 + 6
a) or $(6
a + 39); (c) $23