Emma used
34 of her grey stickers and
27 of her pink stickers to decorate her diary. In the end, she had an equal number of grey stickers and pink stickers left. Given that Emma had a total of 162 grey and pink stickers at first, how many pink stickers did she use to decorate the diary?
|
Grey stickers |
Pink stickers |
Before |
4x5 = 20 u |
7x1 = 7 u |
Change |
- 3x5 = - 15 u |
- 2x1 = - 2 u |
After |
1x5 = 5 u |
5x1 = 5 u |
The number of grey stickers and pink stickers in the end is the same. Make the number of grey stickers and pink stickers in the end the same. LCM of 1 and 5 is 5.
Total number of stickers that Emma used to decorate the diary
= 20 u + 7 u
= 27 u
27 u = 162
1 u = 162 ÷ 27 = 6
Number of pink stickers that Emma used to decorate the diary
= 2 u
= 2 x 6
= 12
Answer(s): 12