The ratio of the number of blue stickers to red stickers is 9 : 5.
After Adam gives away 50 blue stickers and 10 red stickers,
there is an equal number of blue stickers and red stickers.
How many stickers does Adam have now?
|
Blue |
Red |
Before |
9 u |
5 u |
Change |
- 50 |
- 10 |
After |
9 u - 50 |
5 u - 10 |
The number of blue stickers and red stickers in the end is the same.
9 u - 50 = 5 u - 10
9 u - 5 u = 50 - 10
4 u = 40
1 u = 40 ÷ 4 = 10
Number of stickers that Adam has now
= 9 u - 50 + 5 u - 10
= 9 u + 5 u - 50 - 10
= 14 u - 60
= 14 x 10 - 60
= 140 - 60
= 80
Answer(s): 80