The number of apples is 4 times as many as the number of tomatoes. After buying another 21 apples and 78 tomatoes, the number of apples is the same as the number of tomatoes. What is the number of apples at first?
| |
Apples |
Tomatoes |
| Before |
4 u |
1 u |
| Change |
+ 21 |
+ 78 |
| After |
4 u + 21 |
1 u + 78 |
The number of apples and tomatoes is the same in the end.
4 u + 21 = 1 u + 78
4 u - 1 u = 78 - 21
3 u = 57
1 u = 57 ÷ 3 = 19
Number of apples at first
= 4 u
= 4 x 19
= 76
Answer(s): 76
