Adam has some blue stickers and red stickers.
If Adam receives another 29 blue stickers,
the blue stickers will be 50% as many as the red stickers.
If Adam gives away 48 red stickers,
the blue stickers will be 40% as many as the red stickers.
- How many blue stickers are there?
- How many red stickers are there?
|
Scenario 1 |
Scenario 2 |
|
Green |
Blue |
Green |
Blue |
Before |
1 u - 29 |
2 u |
2 p |
5 p + 48 |
Change |
+ 29 |
No change |
No change |
- 48 |
After |
1 u |
2 u |
2 p |
5 p |
(a)
50% =
50100 =
12 40% =
40100 =
25 Scenario 1 Number of green stickers at first = 1 u - 29
Number of blue stickers at first = 2 u
Scenario 2 Number of green stickers at first = 2 p
Number of blue stickers at first = 5 p + 48
1 u - 29 = 2 p --- (1)
2 u = 5 p + 48 --- (2)
From (1)1 u = 29 + 2 p --- (3) (3) x 22 u = 58 + 4 p --- (4)
(2) = (4)5 p + 48 = 58 + 4 p5 p - 4 p = 58 - 481 p = 10
Number of green stickers = 2 p = 2 x 10 = 20 (b) Number of blue stickers = 5 p + 48 = 5 x 10 + 48
= 50 + 48= 98 Answer(s): (a) 20; (b) 98