The number of durians is 5 times as many as the number of pineapples. After buying another 16 durians and 84 pineapples, the number of durians is the same as the number of pineapples. What is the number of durians at first?
|
Durians |
Pineapples |
Before |
5 u |
1 u |
Change |
+ 16 |
+ 84 |
After |
5 u + 16 |
1 u + 84 |
The number of durians and pineapples is the same in the end.
5 u + 16 = 1 u + 84
5 u - 1 u = 84 - 16
4 u = 68
1 u = 68 ÷ 4 = 17
Number of durians at first
= 5 u
= 5 x 17
= 85
Answer(s): 85