During a charity drive, Primary 4 raised 4 times as much money as Primary 2 on the first week. On the second week, Primary 4 raised another $358 while Primary 2 raised another $565. During the entire charity event, Primary 4 raised 2 times as much as Primary 2. What was the total amount raised by Primary 4?
|
Primary 4 (1) |
Primary 2 (2) |
Make p the same (2) x 2 = (3) |
Before |
4 u |
1 u |
2 u |
Change |
+ 358 |
+ 565 |
+ 1130 |
After |
2 p |
1 p |
2 p |
(1) = (3)
4 u + 358 = 2 u + 1130
4 u - 2 u = 1130 - 358
2 u = 772
1 u = 772 ÷ 2 = 386
From (2)
1 p = 386 + 565 = 951
Total amount raised by Primary 4
= 2 p
= 2 x 951
= $1902
Answer: $1902