During a charity drive, Primary 6 raised 4 times as much money as Primary 3 on the first week. On the second week, Primary 6 raised another $354 while Primary 3 raised another $586. During the entire charity event, Primary 6 raised 2 times as much as Primary 3. What was the total amount raised by Primary 6?
|
Primary 6 (1) |
Primary 3 (2) |
Make p the same (2) x 2 = (3) |
Before |
4 u |
1 u |
2 u |
Change |
+ 354 |
+ 586 |
+ 1172 |
After |
2 p |
1 p |
2 p |
(1) = (3)
4 u + 354 = 2 u + 1172
4 u - 2 u = 1172 - 354
2 u = 818
1 u = 818 ÷ 2 = 409
From (2)
1 p = 409 + 586 = 995
Total amount raised by Primary 6
= 2 p
= 2 x 995
= $1990
Answer: $1990