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 $309 while Primary 2 raised another $534. 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 |
+ 309 |
+ 534 |
+ 1602 |
After |
3 p |
1 p |
3 p |
(1) = (3)
6 u + 309 = 3 u + 1602
6 u - 3 u = 1602 - 309
3 u = 1293
1 u = 1293 ÷ 3 = 431
From (2)
1 p = 431 + 534 = 965
Total amount raised by Primary 5
= 3 p
= 3 x 965
= $2895
Answer: $2895