During a charity drive, Primary 5 raised 4 times as much money as Primary 3 on the first week. On the second week, Primary 5 raised another $230 while Primary 3 raised another $561. During the entire charity event, Primary 5 raised 2 times as much as Primary 3. What was the total amount raised by Primary 5?
|
Primary 5 (1) |
Primary 3 (2) |
Make p the same (2) x 2 = (3) |
Before |
4 u |
1 u |
2 u |
Change |
+ 230 |
+ 561 |
+ 1122 |
After |
2 p |
1 p |
2 p |
(1) = (3)
4 u + 230 = 2 u + 1122
4 u - 2 u = 1122 - 230
2 u = 892
1 u = 892 ÷ 2 = 446
From (2)
1 p = 446 + 561 = 1007
Total amount raised by Primary 5
= 2 p
= 2 x 1007
= $2014
Answer: $2014