The ratio of the number of green stickers to red stickers is 9 : 4.
After Adam buys 10 green stickers and 60 red stickers,
there is an equal number of green stickers and red stickers.
How many stickers does Adam have now?
|
Green |
Red |
Before |
9 u |
4 u |
Change |
+ 10 |
+ 60 |
After |
9 u + 10 |
4 u + 60 |
The number of green stickers and red stickers are equal in the end.
9 u + 10 = 4 u + 60
9 u - 4 u = 60 - 10
5 u = 50
1 u = 50 ÷ 5 = 10
Number of stickers that Adam has now
= 9 u + 10 + 4 u + 60
= 9 u + 4 u + 10 + 60
= 13 u + 70
= 13 x 10 + 70
= 130 + 70
= 200
Answer(s): 200