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 $364 while Primary 2 raised another $538. 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 |
+ 364 |
+ 538 |
+ 1076 |
After |
2 p |
1 p |
2 p |
(1) = (3)
4 u + 364 = 2 u + 1076
4 u - 2 u = 1076 - 364
2 u = 712
1 u = 712 ÷ 2 = 356
From (2)
1 p = 356 + 538 = 894
Total amount raised by Primary 4
= 2 p
= 2 x 894
= $1788
Answer: $1788