The ratio of the number of blue stickers to red stickers is 9 : 5.
After Adam gives away 70 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 |
- 70 |
- 10 |
After |
9 u - 70 |
5 u - 10 |
The number of blue stickers and red stickers in the end is the same.
9 u - 70 = 5 u - 10
9 u - 5 u = 70 - 10
4 u = 60
1 u = 60 ÷ 4 = 15
Number of stickers that Adam has now
= 9 u - 70 + 5 u - 10
= 9 u + 5 u - 70 - 10
= 14 u - 80
= 14 x 15 - 80
= 210 - 80
= 130
Answer(s): 130