The ratio of the number of green stickers to blue stickers is 5 : 2.
After Adam buys 20 green stickers and 80 blue stickers,
there is an equal number of green stickers and blue stickers.
How many stickers does Adam have now?
|
Green |
Blue |
Before |
5 u |
2 u |
Change |
+ 20 |
+ 80 |
After |
5 u + 20 |
2 u + 80 |
The number of green stickers and blue stickers are equal in the end.
5 u + 20 = 2 u + 80
5 u - 2 u = 80 - 20
3 u = 60
1 u = 60 ÷ 3 = 20
Number of stickers that Adam has now
= 5 u + 20 + 2 u + 80
= 5 u + 2 u + 20 + 80
= 7 u + 100
= 7 x 20 + 100
= 140 + 100
= 240
Answer(s): 240