The ratio of the number of blue stickers to green stickers is 9 : 5.
After Adam buys 20 blue stickers and 40 green stickers,
there is an equal number of blue stickers and green stickers.
How many stickers does Adam have now?
|
Blue |
Green |
Before |
9 u |
5 u |
Change |
+ 20 |
+ 40 |
After |
9 u + 20 |
5 u + 40 |
The number of blue stickers and green stickers are equal in the end.
9 u + 20 = 5 u + 40
9 u - 5 u = 40 - 20
4 u = 20
1 u = 20 ÷ 4 = 5
Number of stickers that Adam has now
= 9 u + 20 + 5 u + 40
= 9 u + 5 u + 20 + 40
= 14 u + 60
= 14 x 5 + 60
= 70 + 60
= 130
Answer(s): 130