Vincent had
38 as many marbles as Betty. After Vincent gave away 27 marbles, he had 52 less marbles than Betty. How many marbles did Betty have?
| |
Vincent |
Betty |
| Before |
3 u |
8 u |
| Change |
- 27 |
|
| After |
3 u - 27 |
8 u |
Betty had 52 more marbles than Vincent in the end. So, if Vincent had another 52 marbles, he would have the same number of marbles as Betty.
8 u = 3 u - 27 + 52
8 u - 3 u = 52 - 27
5 u = 25
1 u = 25 ÷ 5 = 5
Number of marbles that Betty had at first
= 8 u
= 8 x 5
= 40
Answer: 40
