The ratio of the number of blue stickers to green stickers is 3 : 1.
After Adam buys 30 blue stickers and 80 green stickers,
there is an equal number of blue stickers and green stickers.
How many stickers does Adam have now?
|
Blue |
Green |
Before |
3 u |
1 u |
Change |
+ 30 |
+ 80 |
After |
3 u + 30 |
1 u + 80 |
The number of blue stickers and green stickers are equal in the end.
3 u + 30 = 1 u + 80
3 u - 1 u = 80 - 30
2 u = 50
1 u = 50 ÷ 2 = 25
Number of stickers that Adam has now
= 3 u + 30 + 1 u + 80
= 3 u + 1 u + 30 + 80
= 4 u + 110
= 4 x 25 + 110
= 100 + 110
= 210
Answer(s): 210