The number of red and green stickers are equal.
If Adam gives away 70 red stickers and 30 green stickers,
the ratio of red stickers to green stickers becomes 5 : 9.
How many stickers are there at first?
|
Red |
Green |
Before |
5 u + 70 |
9 u + 30 |
Change |
- 70 |
- 30 |
After |
5 u |
9 u |
The number of red and green stickers is the same at first.
5 u + 70 = 9 u + 30
9 u - 5 u = 70 - 30
4 u = 40
1 u = 40 ÷ 4 = 10
Number of stickers that Adam has at first
= 5 u + 70 + 9 u + 30
= 5 u + 9 u + 70 + 30
= 14 u + 100
= 14 x 10 + 100
= 140 + 100
= 240
Answer(s): 240