During a charity drive, Primary 4 raised 6 times as much money as Primary 1 on the first week. On the second week, Primary 4 raised another $320 while Primary 1 raised another $542. 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 |
6 u |
1 u |
2 u |
Change |
+ 320 |
+ 542 |
+ 1084 |
After |
2 p |
1 p |
2 p |
(1) = (3)
6 u + 320 = 2 u + 1084
6 u - 2 u = 1084 - 320
4 u = 764
1 u = 764 ÷ 4 = 191
From (2)
1 p = 191 + 542 = 733
Total amount raised by Primary 4
= 2 p
= 2 x 733
= $1466
Answer: $1466