Gabriel had 3 times as many books as Simon. After Gabriel and Simon donated 80 books and 18 books away respectively, they were left with an equal number of books. How many books did Gabriel have at first?
| |
Gabriel |
Simon |
| Before |
3 u |
1 u |
| Change |
- 80 |
- 18 |
| After |
3 u - 80 |
1 u - 18 |
Gabriel and Simon had the same number of books left.
3 u - 80 = 1 u - 18
3 u - 1 u = 80 - 18
2 u = 62
1 u = 62 ÷ 2 = 31
Number of books that Gabriel had at first
= 3 u
= 3 x 31
= 93
Answer(s): 93
