During a charity drive, Primary 5 raised 5 times as much money as Primary 1 on the first week. On the second week, Primary 5 raised another $309 while Primary 1 raised another $499. 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 |
5 u |
1 u |
3 u |
Change |
+ 309 |
+ 499 |
+ 1497 |
After |
3 p |
1 p |
3 p |
(1) = (3)
5 u + 309 = 3 u + 1497
5 u - 3 u = 1497 - 309
2 u = 1188
1 u = 1188 ÷ 2 = 594
From (2)
1 p = 594 + 499 = 1093
Total amount raised by Primary 5
= 3 p
= 3 x 1093
= $3279
Answer: $3279