The ratio of the number of blue stickers to green stickers is 3 : 1.
After Adam buys 40 blue stickers and 50 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 |
+ 40 |
+ 50 |
After |
3 u + 40 |
1 u + 50 |
The number of blue stickers and green stickers are equal in the end.
3 u + 40 = 1 u + 50
3 u - 1 u = 50 - 40
2 u = 10
1 u = 10 ÷ 2 = 5
Number of stickers that Adam has now
= 3 u + 40 + 1 u + 50
= 3 u + 1 u + 40 + 50
= 4 u + 90
= 4 x 5 + 90
= 20 + 90
= 110
Answer(s): 110