Cindy and Eva had an equal number of marbles at first. After Cindy gave 9 marbles to Eva, Eva had 28 marbles. How many marbles does Cindy have in the end?
| |
Cindy |
Eva |
| Before |
1 u |
1 u |
| Change |
- 9 |
+ 9 |
| After |
1 u - 9 |
28 |
Number of marbles that Eva had at first
= 28 - 9
= 19
1 u = 19
Number of marbles that Cindy had at first = 19
Number of marbles that Cindy had in the end
= 1 u - 9
= 19 - 9
= 10
Answer(s): 10
