Marion had an equal number of apples and coconuts at first. She sold one-third of the coconuts and bought another 99 apples. In the end, she had thrice as many apples as coconuts. Find the number of coconuts she had at first.
| |
Coconuts |
Apples |
| Before |
3 u |
6 u - 99 |
| Change |
- 1 u |
+ 99 |
| After |
2 u |
6 u |
The number of apples and coconuts at first is the same.
6 u - 99 = 3 u
6 u - 3 u = 99
3 u = 99
1 u = 99 ÷ 3 = 33
Number of coconuts that she had at first
= 3 u
= 3 x 33
= 99
Answer(s): 99
