During a charity drive, Primary 5 raised 6 times as much money as Primary 3 on the first week. On the second week, Primary 5 raised another $336 while Primary 3 raised another $540. 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 |
6 u |
1 u |
2 u |
Change |
+ 336 |
+ 540 |
+ 1080 |
After |
2 p |
1 p |
2 p |
(1) = (3)
6 u + 336 = 2 u + 1080
6 u - 2 u = 1080 - 336
4 u = 744
1 u = 744 ÷ 4 = 186
From (2)
1 p = 186 + 540 = 726
Total amount raised by Primary 5
= 2 p
= 2 x 726
= $1452
Answer: $1452