The ratio of the number of green stickers to blue stickers is 5 : 3.
After Adam gives away 40 green stickers and 20 blue stickers,
there is an equal number of green stickers and blue stickers.
How many stickers does Adam have now?
|
Green |
Blue |
Before |
5 u |
3 u |
Change |
- 40 |
- 20 |
After |
5 u - 40 |
3 u - 20 |
The number of green stickers and blue stickers in the end is the same.
5 u - 40 = 3 u - 20
5 u - 3 u = 40 - 20
2 u = 20
1 u = 20 ÷ 2 = 10
Number of stickers that Adam has now
= 5 u - 40 + 3 u - 20
= 5 u + 3 u - 40 - 20
= 8 u - 60
= 8 x 10 - 60
= 80 - 60
= 20
Answer(s): 20