Gem used
35 of her gold stickers and
27 of her yellow stickers to decorate her diary. In the end, she had an equal number of gold stickers and yellow stickers left. Given that Gem had a total of 273 gold and yellow stickers at first, how many yellow stickers did she use to decorate the diary?
|
Gold stickers |
Yellow stickers |
Before |
5x5 = 25 u |
7x2 = 14 u |
Change |
- 3x5 = - 15 u |
- 2x2 = - 4 u |
After |
2x5 = 10 u |
5x2 = 10 u |
The number of gold stickers and yellow stickers in the end is the same. Make the number of gold stickers and yellow stickers in the end the same. LCM of 2 and 5 is 10.
Total number of stickers that Gem used to decorate the diary
= 25 u + 14 u
= 39 u
39 u = 273
1 u = 273 ÷ 39 = 7
Number of yellow stickers that Gem used to decorate the diary
= 4 u
= 4 x 7
= 28
Answer(s): 28