The ratio of the number of blue stickers to green stickers is 9 : 5.
After Adam buys 30 blue stickers and 90 green stickers,
there is an equal number of blue stickers and green stickers.
How many stickers does Adam have now?
|
Blue |
Green |
Before |
9 u |
5 u |
Change |
+ 30 |
+ 90 |
After |
9 u + 30 |
5 u + 90 |
The number of blue stickers and green stickers are equal in the end.
9 u + 30 = 5 u + 90
9 u - 5 u = 90 - 30
4 u = 60
1 u = 60 ÷ 4 = 15
Number of stickers that Adam has now
= 9 u + 30 + 5 u + 90
= 9 u + 5 u + 30 + 90
= 14 u + 120
= 14 x 15 + 120
= 210 + 120
= 330
Answer(s): 330