Jean used
37 of her red stickers and
35 of her grey stickers to decorate her diary. In the end, she had an equal number of red stickers and grey stickers left. Given that Jean had a total of 153 red and grey stickers at first, how many grey stickers did she use to decorate the diary?
|
Red stickers |
Grey stickers |
Before |
7x1 = 7 u |
5x2 = 10 u |
Change |
- 3x1 = - 3 u |
- 3x2 = - 6 u |
After |
4x1 = 4 u |
2x2 = 4 u |
The number of red stickers and grey stickers in the end is the same. Make the number of red stickers and grey stickers in the end the same. LCM of 4 and 2 is 4.
Total number of stickers that Jean used to decorate the diary
= 7 u + 10 u
= 17 u
17 u = 153
1 u = 153 ÷ 17 = 9
Number of grey stickers that Jean used to decorate the diary
= 6 u
= 6 x 9
= 54
Answer(s): 54