During a charity drive, Primary 6 raised 5 times as much money as Primary 1 on the first week. On the second week, Primary 6 raised another $315 while Primary 1 raised another $557. During the entire charity event, Primary 6 raised 3 times as much as Primary 1. What was the total amount raised by Primary 6?
|
Primary 6 (1) |
Primary 1 (2) |
Make p the same (2) x 3 = (3) |
Before |
5 u |
1 u |
3 u |
Change |
+ 315 |
+ 557 |
+ 1671 |
After |
3 p |
1 p |
3 p |
(1) = (3)
5 u + 315 = 3 u + 1671
5 u - 3 u = 1671 - 315
2 u = 1356
1 u = 1356 ÷ 2 = 678
From (2)
1 p = 678 + 557 = 1235
Total amount raised by Primary 6
= 3 p
= 3 x 1235
= $3705
Answer: $3705