The ratio of the number of blue stickers to green stickers is 5 : 3.
After Adam gives away 93 blue stickers and gives away 45 green stickers,
the ratio becomes of the number of blue stickers to green stickers is 8 : 3.
How many stickers does Adam have now?
|
Make p the same (1) x 3 = (3) |
(1) Blue |
(2) Green |
Make p the same (2) x 8 = (4) |
Before |
15 u |
5 u |
3 u |
24 u |
Change |
- 279 |
- 93 |
- 45 |
- 360 |
After |
24 p |
8 p |
3 p |
24 p |
5 u - 93 = 8 p --- (1)
3 u - 45 = 3 p --- (2)
Make p the same.
(1) x 3
15 u - 279 = 24 p --- (3)
(2) x 8
24 u - 360 = 24 p --- (4)
(4) = (3)
24 u - 360 = 15 u - 279
24 u - 15 u = 360 - 279
9 u = 81
1 u = 81 ÷ 9 = 9
Number of stickers that Adam has now
= 5 u - 93 + 3 u - 45
= 8 u - 138
= 8 x 9 - 138
= 72 - 138
= -66
Answer(s): -66