During a charity drive, Primary 6 raised 4 times as much money as Primary 3 on the first week. On the second week, Primary 6 raised another $398 while Primary 3 raised another $551. During the entire charity event, Primary 6 raised 2 times as much as Primary 3. What was the total amount raised by Primary 6?
|
Primary 6 (1) |
Primary 3 (2) |
Make p the same (2) x 2 = (3) |
Before |
4 u |
1 u |
2 u |
Change |
+ 398 |
+ 551 |
+ 1102 |
After |
2 p |
1 p |
2 p |
(1) = (3)
4 u + 398 = 2 u + 1102
4 u - 2 u = 1102 - 398
2 u = 704
1 u = 704 ÷ 2 = 352
From (2)
1 p = 352 + 551 = 903
Total amount raised by Primary 6
= 2 p
= 2 x 903
= $1806
Answer: $1806