The number of red and blue stickers are equal.
If Adam gives away 70 red stickers and 30 blue stickers,
the ratio of red stickers to blue stickers becomes 4 : 9.
How many stickers are there at first?
|
Red |
Blue |
Before |
4 u + 70 |
9 u + 30 |
Change |
- 70 |
- 30 |
After |
4 u |
9 u |
The number of red and blue stickers is the same at first.
4 u + 70 = 9 u + 30
9 u - 4 u = 70 - 30
5 u = 40
1 u = 40 ÷ 5 = 8
Number of stickers that Adam has at first
= 4 u + 70 + 9 u + 30
= 4 u + 9 u + 70 + 30
= 13 u + 100
= 13 x 8 + 100
= 104 + 100
= 204
Answer(s): 204