The ratio of the number of green stickers to red stickers is 8 : 3.
After Adam buys 30 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 |
8 u |
3 u |
Change |
+ 30 |
+ 50 |
After |
8 u + 30 |
3 u + 50 |
The number of green stickers and red stickers are equal in the end.
8 u + 30 = 3 u + 50
8 u - 3 u = 50 - 30
5 u = 20
1 u = 20 ÷ 5 = 4
Number of stickers that Adam has now
= 8 u + 30 + 3 u + 50
= 8 u + 3 u + 30 + 50
= 11 u + 80
= 11 x 4 + 80
= 44 + 80
= 124
Answer(s): 124