The ratio of the number of red stickers to blue stickers is 9 : 5.
After Adam buys 10 red stickers and 30 blue stickers,
there is an equal number of red stickers and blue stickers.
How many stickers does Adam have now?
|
Red |
Blue |
Before |
9 u |
5 u |
Change |
+ 10 |
+ 30 |
After |
9 u + 10 |
5 u + 30 |
The number of red stickers and blue stickers are equal in the end.
9 u + 10 = 5 u + 30
9 u - 5 u = 30 - 10
4 u = 20
1 u = 20 ÷ 4 = 5
Number of stickers that Adam has now
= 9 u + 10 + 5 u + 30
= 9 u + 5 u + 10 + 30
= 14 u + 40
= 14 x 5 + 40
= 70 + 40
= 110
Answer(s): 110