During a charity drive, Primary 4 raised 6 times as much money as Primary 2 on the first week. On the second week, Primary 4 raised another $213 while Primary 2 raised another $524. 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 |
6 u |
1 u |
3 u |
Change |
+ 213 |
+ 524 |
+ 1572 |
After |
3 p |
1 p |
3 p |
(1) = (3)
6 u + 213 = 3 u + 1572
6 u - 3 u = 1572 - 213
3 u = 1359
1 u = 1359 ÷ 3 = 453
From (2)
1 p = 453 + 524 = 977
Total amount raised by Primary 4
= 3 p
= 3 x 977
= $2931
Answer: $2931