Bobby has $12. Fred has $5
d more than Bobby. Peter has $2
d less than Fred.
- Find the amount of money that Peter has in terms of d.
- Find the total amount of money that the three boys have in terms of d.
- If d = 7, how much does Peter have?
(a)
Amount that Bobby has = $12
Amount that Fred has = $(12 + 5
d)
Amount that Peter has
= 12 + 5
d - 2
d = $(12 + 3
d)
(b)
Total amount that the three boys have
= 12 + 12 + 5
d + 12 + 3
d= 12 + 12 + 12 + 5
d + 3
d = $(36 + 8
d)
(c)
Amount that Peter has
= 12 + 3
d= 12 + 3 x 7
= 12 + 21
= $33
Answer(s): (a) $(12 + 3
d) or $(3
d + 12); (b) $(36 + 8
d) or $(8
d + 36); (c) $33