During a charity drive, Primary 5 raised 6 times as much money as Primary 2 on the first week. On the second week, Primary 5 raised another $312 while Primary 2 raised another $536. During the entire charity event, Primary 5 raised 3 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 3 = (3) |
Before |
6 u |
1 u |
3 u |
Change |
+ 312 |
+ 536 |
+ 1608 |
After |
3 p |
1 p |
3 p |
(1) = (3)
6 u + 312 = 3 u + 1608
6 u - 3 u = 1608 - 312
3 u = 1296
1 u = 1296 ÷ 3 = 432
From (2)
1 p = 432 + 536 = 968
Total amount raised by Primary 5
= 3 p
= 3 x 968
= $2904
Answer: $2904