Ivory had an equal number of coconuts and oranges at first. She sold one-quarter of the oranges and bought another 78 coconuts. In the end, she had twice as many coconuts as oranges. Find the number of oranges she had at first.
| |
Oranges |
Coconuts |
| Before |
4 u |
6 u - 78 |
| Change |
- 1 u |
+ 78 |
| After |
3 u |
6 u |
The number of coconuts and oranges at first is the same.
6 u - 78 = 4 u
6 u - 4 u = 78
2 u = 78
1 u = 78 ÷ 2 = 39
Number of oranges that she had at first
= 4 u
= 4 x 39
= 156
Answer(s): 156
