The ratio of the number of blue stickers to green stickers is 7 : 2.
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 |
7 u |
2 u |
Change |
+ 20 |
+ 40 |
After |
7 u + 20 |
2 u + 40 |
The number of blue stickers and green stickers are equal in the end.
7 u + 20 = 2 u + 40
7 u - 2 u = 40 - 20
5 u = 20
1 u = 20 ÷ 5 = 4
Number of stickers that Adam has now
= 7 u + 20 + 2 u + 40
= 7 u + 2 u + 20 + 40
= 9 u + 60
= 9 x 4 + 60
= 36 + 60
= 96
Answer(s): 96