The ratio of the number of red stickers to green stickers is 7 : 2.
After Adam buys 50 red stickers and 80 green stickers,
there is an equal number of red stickers and green stickers.
How many stickers does Adam have now?
|
Red |
Green |
Before |
7 u |
2 u |
Change |
+ 50 |
+ 80 |
After |
7 u + 50 |
2 u + 80 |
The number of red stickers and green stickers are equal in the end.
7 u + 50 = 2 u + 80
7 u - 2 u = 80 - 50
5 u = 30
1 u = 30 ÷ 5 = 6
Number of stickers that Adam has now
= 7 u + 50 + 2 u + 80
= 7 u + 2 u + 50 + 80
= 9 u + 130
= 9 x 6 + 130
= 54 + 130
= 184
Answer(s): 184