The number of green and blue stickers are equal.
If Adam gives away 90 green stickers and 10 blue stickers,
the ratio of green stickers to blue stickers becomes 1 : 3.
How many stickers are there at first?
|
Green |
Blue |
Before |
1 u + 90 |
3 u + 10 |
Change |
- 90 |
- 10 |
After |
1 u |
3 u |
The number of green and blue stickers is the same at first.
1 u + 90 = 3 u + 10
3 u - 1 u = 90 - 10
2 u = 80
1 u = 80 ÷ 2 = 40
Number of stickers that Adam has at first
= 1 u + 90 + 3 u + 10
= 1 u + 3 u + 90 + 10
= 4 u + 100
= 4 x 40 + 100
= 160 + 100
= 260
Answer(s): 260