Xandra has some buttons. She has 9 less buttons in Bag B than in Bag C. After 20 buttons were transferred from Bag C to Bag B, there were 78 buttons in Bag C.
- How many buttons were there in Bag C at first?
- How many buttons were there in Bag B in the end?
|
Bag B |
Bag C |
Before |
1 u |
1 u + 9 |
Change |
+ 20 |
- 20 |
After |
1 u + 20 |
78 |
(a)
Number of buttons in Bag C at first
= 78 + 20
= 98
(b)
Number of buttons in Bag B at first
= 98 - 9
= 89
Number of buttons in Bag B in the end
= 89 + 20
= 109
Answer(s): (a) 98; (b) 109