Roshel and Victoria had the same number of marbles. After Roshel had given away 78 marbles, Victoria had 7 times as many marbles as Roshel. How many marbles did each of them have at first?
| |
Roshel |
Victoria |
| Before |
1 u + 78 |
7 u |
| Change |
- 78 |
|
| After |
1 u |
7 u |
Number of marbles that Victoria had remains unchanged.
Number of marbles that Roshel and Victoria had at first is equal.
7 u = 1 u + 78
7 u - 1 u = 78
6 u = 78
1 u = 78 ÷ 6= 13
Number of marbles that each of them had at first
= 1 u + 78
= 13 + 78
= 91
Answer(s): 91
