During a charity drive, Primary 5 raised 4 times as much money as Primary 2 on the first week. On the second week, Primary 5 raised another $362 while Primary 2 raised another $478. During the entire charity event, Primary 5 raised 2 times as much as Primary 2. What was the total amount raised by Primary 5?
|
Primary 5 (1) |
Primary 2 (2) |
Make p the same (2) x 2 = (3) |
Before |
4 u |
1 u |
2 u |
Change |
+ 362 |
+ 478 |
+ 956 |
After |
2 p |
1 p |
2 p |
(1) = (3)
4 u + 362 = 2 u + 956
4 u - 2 u = 956 - 362
2 u = 594
1 u = 594 ÷ 2 = 297
From (2)
1 p = 297 + 478 = 775
Total amount raised by Primary 5
= 2 p
= 2 x 775
= $1550
Answer: $1550