The number of green and blue stickers are equal.
If Adam gives away 50 green stickers and 10 blue stickers,
the ratio of green stickers to blue stickers becomes 5 : 7.
How many stickers are there at first?
|
Green |
Blue |
Before |
5 u + 50 |
7 u + 10 |
Change |
- 50 |
- 10 |
After |
5 u |
7 u |
The number of green and blue stickers is the same at first.
5 u + 50 = 7 u + 10
7 u - 5 u = 50 - 10
2 u = 40
1 u = 40 ÷ 2 = 20
Number of stickers that Adam has at first
= 5 u + 50 + 7 u + 10
= 5 u + 7 u + 50 + 10
= 12 u + 60
= 12 x 20 + 60
= 240 + 60
= 300
Answer(s): 300