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 $261 while Primary 2 raised another $501. 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 |
+ 261 |
+ 501 |
+ 1503 |
After |
3 p |
1 p |
3 p |
(1) = (3)
5 u + 261 = 3 u + 1503
5 u - 3 u = 1503 - 261
2 u = 1242
1 u = 1242 ÷ 2 = 621
From (2)
1 p = 621 + 501 = 1122
Total amount raised by Primary 4
= 3 p
= 3 x 1122
= $3366
Answer: $3366