The ratio of the number of blue stickers to red stickers is 5 : 3.
After Adam buys 30 blue stickers and 50 red stickers,
there is an equal number of blue stickers and red stickers.
How many stickers does Adam have now?
| |
Blue |
Red |
| Before |
5 u |
3 u |
| Change |
+ 30 |
+ 50 |
| After |
5 u + 30 |
3 u + 50 |
The number of blue stickers and red stickers are equal in the end.
5 u + 30 = 3 u + 50
5 u - 3 u = 50 - 30
2 u = 20
1 u = 20 ÷ 2 = 10
Number of stickers that Adam has now
= 5 u + 30 + 3 u + 50
= 5 u + 3 u + 30 + 50
= 8 u + 80
= 8 x 10 + 80
= 80 + 80
= 160
Answer(s): 160
