John has $20. Bobby has $5
z more than John. Eric has $2
z less than Bobby.
- Find the amount of money that Eric has in terms of z.
- Find the total amount of money that the three boys have in terms of z.
- If z = 6, how much does Eric have?
(a)
Amount that John has = $20
Amount that Bobby has = $(20 + 5
z)
Amount that Eric has
= 20 + 5
z - 2
z = $(20 + 3
z)
(b)
Total amount that the three boys have
= 20 + 20 + 5
z + 20 + 3
z= 20 + 20 + 20 + 5
z + 3
z = $(60 + 8
z)
(c)
Amount that Eric has
= 20 + 3
z= 20 + 3 x 6
= 20 + 18
= $38
Answer(s): (a) $(20 + 3
z) or $(3
z + 20); (b) $(60 + 8
z) or $(8
z + 60); (c) $38