The ratio of the number of blue stickers to green stickers is 5 : 3.
After Adam gives away 70 blue stickers and 40 green stickers,
there is an equal number of blue stickers and green stickers.
How many stickers does Adam have now?
|
Blue |
Green |
Before |
5 u |
3 u |
Change |
- 70 |
- 40 |
After |
5 u - 70 |
3 u - 40 |
The number of blue stickers and green stickers in the end is the same.
5 u - 70 = 3 u - 40
5 u - 3 u = 70 - 40
2 u = 30
1 u = 30 ÷ 2 = 15
Number of stickers that Adam has now
= 5 u - 70 + 3 u - 40
= 5 u + 3 u - 70 - 40
= 8 u - 110
= 8 x 15 - 110
= 120 - 110
= 10
Answer(s): 10