The number of green and blue stickers are equal.
If Adam gives away 50 green stickers and 40 blue stickers,
the ratio of green stickers to blue stickers becomes 4 : 9.
How many stickers are there at first?
|
Green |
Blue |
Before |
4 u + 50 |
9 u + 40 |
Change |
- 50 |
- 40 |
After |
4 u |
9 u |
The number of green and blue stickers is the same at first.
4 u + 50 = 9 u + 40
9 u - 4 u = 50 - 40
5 u = 10
1 u = 10 ÷ 5 = 2
Number of stickers that Adam has at first
= 4 u + 50 + 9 u + 40
= 4 u + 9 u + 50 + 40
= 13 u + 90
= 13 x 2 + 90
= 26 + 90
= 116
Answer(s): 116