During a charity drive, Primary 4 raised 4 times as much money as Primary 2 on the first week. On the second week, Primary 4 raised another $392 while Primary 2 raised another $592. During the entire charity event, Primary 4 raised 2 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 2 = (3) |
Before |
4 u |
1 u |
2 u |
Change |
+ 392 |
+ 592 |
+ 1184 |
After |
2 p |
1 p |
2 p |
(1) = (3)
4 u + 392 = 2 u + 1184
4 u - 2 u = 1184 - 392
2 u = 792
1 u = 792 ÷ 2 = 396
From (2)
1 p = 396 + 592 = 988
Total amount raised by Primary 4
= 2 p
= 2 x 988
= $1976
Answer: $1976