During a charity drive, Primary 5 raised 5 times as much money as Primary 3 on the first week. On the second week, Primary 5 raised another $343 while Primary 3 raised another $591. During the entire charity event, Primary 5 raised 3 times as much as Primary 3. What was the total amount raised by Primary 5?
|
Primary 5 (1) |
Primary 3 (2) |
Make p the same (2) x 3 = (3) |
Before |
5 u |
1 u |
3 u |
Change |
+ 343 |
+ 591 |
+ 1773 |
After |
3 p |
1 p |
3 p |
(1) = (3)
5 u + 343 = 3 u + 1773
5 u - 3 u = 1773 - 343
2 u = 1430
1 u = 1430 ÷ 2 = 715
From (2)
1 p = 715 + 591 = 1306
Total amount raised by Primary 5
= 3 p
= 3 x 1306
= $3918
Answer: $3918