The ratio of the number of green stickers to red stickers is 8 : 3.
After Adam gives away 60 green stickers and 20 red stickers,
there is an equal number of green stickers and red stickers.
How many stickers does Adam have now?
|
Green |
Red |
Before |
8 u |
3 u |
Change |
- 60 |
- 20 |
After |
8 u - 60 |
3 u - 20 |
The number of green stickers and red stickers in the end is the same.
8 u - 60 = 3 u - 20
8 u - 3 u = 60 - 20
5 u = 40
1 u = 40 ÷ 5 = 8
Number of stickers that Adam has now
= 8 u - 60 + 3 u - 20
= 8 u + 3 u - 60 - 20
= 11 u - 80
= 11 x 8 - 80
= 88 - 80
= 8
Answer(s): 8