The number of blue and green stickers are equal.
If Adam gives away 80 blue stickers and 40 green stickers,
the ratio of blue stickers to green stickers becomes 2 : 7.
How many stickers are there at first?
|
Blue |
Green |
Before |
2 u + 80 |
7 u + 40 |
Change |
- 80 |
- 40 |
After |
2 u |
7 u |
The number of blue and green stickers is the same at first.
2 u + 80 = 7 u + 40
7 u - 2 u = 80 - 40
5 u = 40
1 u = 40 ÷ 5 = 8
Number of stickers that Adam has at first
= 2 u + 80 + 7 u + 40
= 2 u + 7 u + 80 + 40
= 9 u + 120
= 9 x 8 + 120
= 72 + 120
= 192
Answer(s): 192