The ratio of the number of red stickers to green stickers is 8 : 3.
After Adam gives away 90 red stickers and 20 green stickers,
there is an equal number of red stickers and green stickers.
How many stickers does Adam have now?
|
Red |
Green |
Before |
8 u |
3 u |
Change |
- 90 |
- 20 |
After |
8 u - 90 |
3 u - 20 |
The number of red stickers and green stickers in the end is the same.
8 u - 90 = 3 u - 20
8 u - 3 u = 90 - 20
5 u = 70
1 u = 70 ÷ 5 = 14
Number of stickers that Adam has now
= 8 u - 90 + 3 u - 20
= 8 u + 3 u - 90 - 20
= 11 u - 110
= 11 x 14 - 110
= 154 - 110
= 44
Answer(s): 44