The number of blue and red stickers are equal.
If Adam gives away 50 blue stickers and 30 red stickers,
the ratio of blue stickers to red stickers becomes 3 : 5.
How many stickers are there at first?
|
Blue |
Red |
Before |
3 u + 50 |
5 u + 30 |
Change |
- 50 |
- 30 |
After |
3 u |
5 u |
The number of blue and red stickers is the same at first.
3 u + 50 = 5 u + 30
5 u - 3 u = 50 - 30
2 u = 20
1 u = 20 ÷ 2 = 10
Number of stickers that Adam has at first
= 3 u + 50 + 5 u + 30
= 3 u + 5 u + 50 + 30
= 8 u + 80
= 8 x 10 + 80
= 80 + 80
= 160
Answer(s): 160