Nick had 4 times as many books as Gabriel. After Nick and Gabriel donated 91 books and 10 books away respectively, they were left with an equal number of books. How many books did Nick have at first?
| |
Nick |
Gabriel |
| Before |
4 u |
1 u |
| Change |
- 91 |
- 10 |
| After |
4 u - 91 |
1 u - 10 |
Nick and Gabriel had the same number of books left.
4 u - 91 = 1 u - 10
4 u - 1 u = 91 - 10
3 u = 81
1 u = 81 ÷ 3 = 27
Number of books that Nick had at first
= 4 u
= 4 x 27
= 108
Answer(s): 108
