The ratio of the number of blue stickers to red stickers is 8 : 5.
After Adam gives away 50 blue stickers and 20 red stickers,
there is an equal number of blue stickers and red stickers.
How many stickers does Adam have now?
|
Blue |
Red |
Before |
8 u |
5 u |
Change |
- 50 |
- 20 |
After |
8 u - 50 |
5 u - 20 |
The number of blue stickers and red stickers in the end is the same.
8 u - 50 = 5 u - 20
8 u - 5 u = 50 - 20
3 u = 30
1 u = 30 ÷ 3 = 10
Number of stickers that Adam has now
= 8 u - 50 + 5 u - 20
= 8 u + 5 u - 50 - 20
= 13 u - 70
= 13 x 10 - 70
= 130 - 70
= 60
Answer(s): 60