Vincent and Fabian had a total of 217 marbles at first. After Vincent bought 21 more marbles and Fabian gave away 16 marbles, Vincent now has the same number of marbles as Fabian. How many marbles did Vincent have at first?
| |
Vincent |
Fabian |
Total |
| Before |
1 u - 21 |
1 u + 16 |
217 |
| Change |
+ 21 |
- 16 |
|
| After |
1 u |
1 u |
222 |
Total number of marbles in the end
= 217 + 21 - 16
= 222
2 u = 222
1 u = 222 ÷ 2 = 111
Number of marbles that Vincent had in the end
= 1 u
= 111
Number of marbles that Vincent had at first
= 111 - 21
= 90
Answer(s): 90
