The number of blue and red stickers are equal.
If Adam gives away 70 blue stickers and 10 red stickers,
the ratio of blue stickers to red stickers becomes 1 : 3.
How many stickers are there at first?
|
Blue |
Red |
Before |
1 u + 70 |
3 u + 10 |
Change |
- 70 |
- 10 |
After |
1 u |
3 u |
The number of blue and red stickers is the same at first.
1 u + 70 = 3 u + 10
3 u - 1 u = 70 - 10
2 u = 60
1 u = 60 ÷ 2 = 30
Number of stickers that Adam has at first
= 1 u + 70 + 3 u + 10
= 1 u + 3 u + 70 + 10
= 4 u + 80
= 4 x 30 + 80
= 120 + 80
= 200
Answer(s): 200