The ratio of the number of blue stickers to green stickers is 5 : 3.
After Adam buys 20 blue stickers and 30 green stickers,
there is an equal number of blue stickers and green stickers.
How many stickers does Adam have now?
|
Blue |
Green |
Before |
5 u |
3 u |
Change |
+ 20 |
+ 30 |
After |
5 u + 20 |
3 u + 30 |
The number of blue stickers and green stickers are equal in the end.
5 u + 20 = 3 u + 30
5 u - 3 u = 30 - 20
2 u = 10
1 u = 10 ÷ 2 = 5
Number of stickers that Adam has now
= 5 u + 20 + 3 u + 30
= 5 u + 3 u + 20 + 30
= 8 u + 50
= 8 x 5 + 50
= 40 + 50
= 90
Answer(s): 90