During a charity drive, Primary 6 raised 5 times as much money as Primary 2 on the first week. On the second week, Primary 6 raised another $309 while Primary 2 raised another $561. During the entire charity event, Primary 6 raised 2 times as much as Primary 2. What was the total amount raised by Primary 6?
|
Primary 6 (1) |
Primary 2 (2) |
Make p the same (2) x 2 = (3) |
Before |
5 u |
1 u |
2 u |
Change |
+ 309 |
+ 561 |
+ 1122 |
After |
2 p |
1 p |
2 p |
(1) = (3)
5 u + 309 = 2 u + 1122
5 u - 2 u = 1122 - 309
3 u = 813
1 u = 813 ÷ 3 = 271
From (2)
1 p = 271 + 561 = 832
Total amount raised by Primary 6
= 2 p
= 2 x 832
= $1664
Answer: $1664