Ryan has $13. Justin has $5
r more than Ryan. Oscar has $2
r less than Justin.
- Find the amount of money that Oscar has in terms of r.
- Find the total amount of money that the three boys have in terms of r.
- If r = 7, how much does Oscar have?
(a)
Amount that Ryan has = $13
Amount that Justin has = $(13 + 5
r)
Amount that Oscar has
= 13 + 5
r - 2
r = $(13 + 3
r)
(b)
Total amount that the three boys have
= 13 + 13 + 5
r + 13 + 3
r= 13 + 13 + 13 + 5
r + 3
r = $(39 + 8
r)
(c)
Amount that Oscar has
= 13 + 3
r= 13 + 3 x 7
= 13 + 21
= $34
Answer(s): (a) $(13 + 3
r) or $(3
r + 13); (b) $(39 + 8
r) or $(8
r + 39); (c) $34