During a charity drive, Primary 4 raised 5 times as much money as Primary 3 on the first week. On the second week, Primary 4 raised another $342 while Primary 3 raised another $567. During the entire charity event, Primary 4 raised 2 times as much as Primary 3. What was the total amount raised by Primary 4?
|
Primary 4 (1) |
Primary 3 (2) |
Make p the same (2) x 2 = (3) |
Before |
5 u |
1 u |
2 u |
Change |
+ 342 |
+ 567 |
+ 1134 |
After |
2 p |
1 p |
2 p |
(1) = (3)
5 u + 342 = 2 u + 1134
5 u - 2 u = 1134 - 342
3 u = 792
1 u = 792 ÷ 3 = 264
From (2)
1 p = 264 + 567 = 831
Total amount raised by Primary 4
= 2 p
= 2 x 831
= $1662
Answer: $1662