The ratio of the number of red stickers to green stickers is 7 : 3.
After Adam buys 10 red stickers and 50 green stickers,
there is an equal number of red stickers and green stickers.
How many stickers does Adam have now?
|
Red |
Green |
Before |
7 u |
3 u |
Change |
+ 10 |
+ 50 |
After |
7 u + 10 |
3 u + 50 |
The number of red stickers and green stickers are equal in the end.
7 u + 10 = 3 u + 50
7 u - 3 u = 50 - 10
4 u = 40
1 u = 40 ÷ 4 = 10
Number of stickers that Adam has now
= 7 u + 10 + 3 u + 50
= 7 u + 3 u + 10 + 50
= 10 u + 60
= 10 x 10 + 60
= 100 + 60
= 160
Answer(s): 160