The ratio of the number of green stickers to red stickers is 8 : 5.
After Adam gives away 60 green stickers and 30 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 |
5 u |
Change |
- 60 |
- 30 |
After |
8 u - 60 |
5 u - 30 |
The number of green stickers and red stickers in the end is the same.
8 u - 60 = 5 u - 30
8 u - 5 u = 60 - 30
3 u = 30
1 u = 30 ÷ 3 = 10
Number of stickers that Adam has now
= 8 u - 60 + 5 u - 30
= 8 u + 5 u - 60 - 30
= 13 u - 90
= 13 x 10 - 90
= 130 - 90
= 40
Answer(s): 40