The number of green and blue stickers are equal.
If Adam gives away 80 green stickers and 50 blue stickers,
the ratio of green stickers to blue stickers becomes 2 : 7.
How many stickers are there at first?
|
Green |
Blue |
Before |
2 u + 80 |
7 u + 50 |
Change |
- 80 |
- 50 |
After |
2 u |
7 u |
The number of green and blue stickers is the same at first.
2 u + 80 = 7 u + 50
7 u - 2 u = 80 - 50
5 u = 30
1 u = 30 ÷ 5 = 6
Number of stickers that Adam has at first
= 2 u + 80 + 7 u + 50
= 2 u + 7 u + 80 + 50
= 9 u + 130
= 9 x 6 + 130
= 54 + 130
= 184
Answer(s): 184