The ratio of the number of green stickers to red stickers is 7 : 5.
After Adam buys 10 green stickers and 50 red stickers,
there is an equal number of green stickers and red stickers.
How many stickers does Adam have now?
|
Green |
Red |
Before |
7 u |
5 u |
Change |
+ 10 |
+ 50 |
After |
7 u + 10 |
5 u + 50 |
The number of green stickers and red stickers are equal in the end.
7 u + 10 = 5 u + 50
7 u - 5 u = 50 - 10
2 u = 40
1 u = 40 ÷ 2 = 20
Number of stickers that Adam has now
= 7 u + 10 + 5 u + 50
= 7 u + 5 u + 10 + 50
= 12 u + 60
= 12 x 20 + 60
= 240 + 60
= 300
Answer(s): 300