During a charity drive, Primary 5 raised 5 times as much money as Primary 1 on the first week. On the second week, Primary 5 raised another $395 while Primary 1 raised another $551. During the entire charity event, Primary 5 raised 3 times as much as Primary 1. What was the total amount raised by Primary 5?
|
Primary 5 (1) |
Primary 1 (2) |
Make p the same (2) x 3 = (3) |
Before |
5 u |
1 u |
3 u |
Change |
+ 395 |
+ 551 |
+ 1653 |
After |
3 p |
1 p |
3 p |
(1) = (3)
5 u + 395 = 3 u + 1653
5 u - 3 u = 1653 - 395
2 u = 1258
1 u = 1258 ÷ 2 = 629
From (2)
1 p = 629 + 551 = 1180
Total amount raised by Primary 5
= 3 p
= 3 x 1180
= $3540
Answer: $3540