The ratio of the number of green stickers to blue stickers is 7 : 5.
After Adam gives away 80 green stickers and 20 blue stickers,
there is an equal number of green stickers and blue stickers.
How many stickers does Adam have now?
|
Green |
Blue |
Before |
7 u |
5 u |
Change |
- 80 |
- 20 |
After |
7 u - 80 |
5 u - 20 |
The number of green stickers and blue stickers in the end is the same.
7 u - 80 = 5 u - 20
7 u - 5 u = 80 - 20
2 u = 60
1 u = 60 ÷ 2 = 30
Number of stickers that Adam has now
= 7 u - 80 + 5 u - 20
= 7 u + 5 u - 80 - 20
= 12 u - 100
= 12 x 30 - 100
= 360 - 100
= 260
Answer(s): 260