The ratio of the number of blue stickers to green stickers is 8 : 3.
After Adam gives away 90 blue stickers and 10 green stickers,
there is an equal number of blue stickers and green stickers.
How many stickers does Adam have now?
|
Blue |
Green |
Before |
8 u |
3 u |
Change |
- 90 |
- 10 |
After |
8 u - 90 |
3 u - 10 |
The number of blue stickers and green stickers in the end is the same.
8 u - 90 = 3 u - 10
8 u - 3 u = 90 - 10
5 u = 80
1 u = 80 ÷ 5 = 16
Number of stickers that Adam has now
= 8 u - 90 + 3 u - 10
= 8 u + 3 u - 90 - 10
= 11 u - 100
= 11 x 16 - 100
= 176 - 100
= 76
Answer(s): 76