During a charity drive, Primary 4 raised 5 times as much money as Primary 1 on the first week. On the second week, Primary 4 raised another $256 while Primary 1 raised another $500. During the entire charity event, Primary 4 raised 2 times as much as Primary 1. What was the total amount raised by Primary 4?
|
Primary 4 (1) |
Primary 1 (2) |
Make p the same (2) x 2 = (3) |
Before |
5 u |
1 u |
2 u |
Change |
+ 256 |
+ 500 |
+ 1000 |
After |
2 p |
1 p |
2 p |
(1) = (3)
5 u + 256 = 2 u + 1000
5 u - 2 u = 1000 - 256
3 u = 744
1 u = 744 ÷ 3 = 248
From (2)
1 p = 248 + 500 = 748
Total amount raised by Primary 4
= 2 p
= 2 x 748
= $1496
Answer: $1496