During a charity drive, Primary 4 raised 4 times as much money as Primary 1 on the first week. On the second week, Primary 4 raised another $368 while Primary 1 raised another $582. 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 |
4 u |
1 u |
2 u |
Change |
+ 368 |
+ 582 |
+ 1164 |
After |
2 p |
1 p |
2 p |
(1) = (3)
4 u + 368 = 2 u + 1164
4 u - 2 u = 1164 - 368
2 u = 796
1 u = 796 ÷ 2 = 398
From (2)
1 p = 398 + 582 = 980
Total amount raised by Primary 4
= 2 p
= 2 x 980
= $1960
Answer: $1960