The number of green and red stickers are equal.
If Adam gives away 70 green stickers and 10 red stickers,
the ratio of green stickers to red stickers becomes 3 : 8.
How many stickers are there at first?
|
Green |
Red |
Before |
3 u + 70 |
8 u + 10 |
Change |
- 70 |
- 10 |
After |
3 u |
8 u |
The number of green and red stickers is the same at first.
3 u + 70 = 8 u + 10
8 u - 3 u = 70 - 10
5 u = 60
1 u = 60 ÷ 5 = 12
Number of stickers that Adam has at first
= 3 u + 70 + 8 u + 10
= 3 u + 8 u + 70 + 10
= 11 u + 80
= 11 x 12 + 80
= 132 + 80
= 212
Answer(s): 212