During a charity drive, Primary 5 raised 4 times as much money as Primary 3 on the first week. On the second week, Primary 5 raised another $206 while Primary 3 raised another $548. During the entire charity event, Primary 5 raised 2 times as much as Primary 3. What was the total amount raised by Primary 5?
|
Primary 5 (1) |
Primary 3 (2) |
Make p the same (2) x 2 = (3) |
Before |
4 u |
1 u |
2 u |
Change |
+ 206 |
+ 548 |
+ 1096 |
After |
2 p |
1 p |
2 p |
(1) = (3)
4 u + 206 = 2 u + 1096
4 u - 2 u = 1096 - 206
2 u = 890
1 u = 890 ÷ 2 = 445
From (2)
1 p = 445 + 548 = 993
Total amount raised by Primary 5
= 2 p
= 2 x 993
= $1986
Answer: $1986