During a charity drive, Primary 4 raised 5 times as much money as Primary 2 on the first week. On the second week, Primary 4 raised another $396 while Primary 2 raised another $530. During the entire charity event, Primary 4 raised 3 times as much as Primary 2. What was the total amount raised by Primary 4?
|
Primary 4 (1) |
Primary 2 (2) |
Make p the same (2) x 3 = (3) |
Before |
5 u |
1 u |
3 u |
Change |
+ 396 |
+ 530 |
+ 1590 |
After |
3 p |
1 p |
3 p |
(1) = (3)
5 u + 396 = 3 u + 1590
5 u - 3 u = 1590 - 396
2 u = 1194
1 u = 1194 ÷ 2 = 597
From (2)
1 p = 597 + 530 = 1127
Total amount raised by Primary 4
= 3 p
= 3 x 1127
= $3381
Answer: $3381