The number of durians is 3 times as many as the number of kiwis. After buying another 22 durians and 42 kiwis, the number of durians is the same as the number of kiwis. What is the number of durians at first?
| |
Durians |
Kiwis |
| Before |
3 u |
1 u |
| Change |
+ 22 |
+ 42 |
| After |
3 u + 22 |
1 u + 42 |
The number of durians and kiwis is the same in the end.
3 u + 22 = 1 u + 42
3 u - 1 u = 42 - 22
2 u = 20
1 u = 20 ÷ 2 = 10
Number of durians at first
= 3 u
= 3 x 10
= 30
Answer(s): 30
