Wendy used
35 of her grey stickers and
34 of her blue stickers to decorate her diary. In the end, she had an equal number of grey stickers and blue stickers left. Given that Wendy had a total of 65 grey and blue stickers at first, how many blue stickers did she use to decorate the diary?
|
Grey stickers |
Blue stickers |
Before |
5x1 = 5 u |
4x2 = 8 u |
Change |
- 3x1 = - 3 u |
- 3x2 = - 6 u |
After |
2x1 = 2 u |
1x2 = 2 u |
The number of grey stickers and blue stickers in the end is the same. Make the number of grey stickers and blue stickers in the end the same. LCM of 2 and 1 is 2.
Total number of stickers that Wendy used to decorate the diary
= 5 u + 8 u
= 13 u
13 u = 65
1 u = 65 ÷ 13 = 5
Number of blue stickers that Wendy used to decorate the diary
= 6 u
= 6 x 5
= 30
Answer(s): 30