Julie had 150 stamps. Oliver had 15 of what Julie had. After Julie used some of his stamps and Oliver used 13 of his stamps, Julie had 34 as many stamps left as Oliver.
- How many stamps did Oliver have at first?
- How many stamps did Julie use?
|
Julie |
Oliver |
Before |
150 |
30 |
Change |
- ? |
- 10 |
After |
15 |
20 |
(a)
Number of stamps that Oliver had at first
=
15 x 150
= 30
(b)
Number of stamps that Oliver used
=
13 x 30
= 10
Number of stamps that Oliver had left
= 30 - 10
= 20
Number of stamps that Julie had left
=
34 x 20
= 15
Number of stamps that Julie used
= 150 - 15
= 135
Answer(s): (a) 30; (b) 135