During a charity drive, Primary 5 raised 6 times as much money as Primary 1 on the first week. On the second week, Primary 5 raised another $390 while Primary 1 raised another $544. During the entire charity event, Primary 5 raised 3 times as much as Primary 1. What was the total amount raised by Primary 5?
|
Primary 5 (1) |
Primary 1 (2) |
Make p the same (2) x 3 = (3) |
Before |
6 u |
1 u |
3 u |
Change |
+ 390 |
+ 544 |
+ 1632 |
After |
3 p |
1 p |
3 p |
(1) = (3)
6 u + 390 = 3 u + 1632
6 u - 3 u = 1632 - 390
3 u = 1242
1 u = 1242 ÷ 3 = 414
From (2)
1 p = 414 + 544 = 958
Total amount raised by Primary 5
= 3 p
= 3 x 958
= $2874
Answer: $2874