Betty has some marbles. She has 12 less marbles in Bag X than in Bag Y. After 23 marbles were transferred from Bag Y to Bag X, there were 86 marbles in Bag Y.
- How many marbles were there in Bag Y at first?
- How many marbles were there in Bag X in the end?
|
Bag X |
Bag Y |
Before |
1 u |
1 u + 12 |
Change |
+ 23 |
- 23 |
After |
1 u + 23 |
86 |
(a)
Number of marbles in Bag Y at first
= 86 + 23
= 109
(b)
Number of marbles in Bag X at first
= 109 - 12
= 97
Number of marbles in Bag X in the end
= 97 + 23
= 120
Answer(s): (a) 109; (b) 120