Vanessa used
57 of her red stickers and
37 of her pink stickers to decorate her diary. In the end, she had an equal number of red stickers and pink stickers left. Given that Vanessa had a total of 147 red and pink stickers at first, how many pink stickers did she use to decorate the diary?
|
Red stickers |
Pink stickers |
Before |
7x2 = 14 u |
7x1 = 7 u |
Change |
- 5x2 = - 10 u |
- 3x1 = - 3 u |
After |
2x2 = 4 u |
4x1 = 4 u |
The number of red stickers and pink stickers in the end is the same. Make the number of red stickers and pink stickers in the end the same. LCM of 2 and 4 is 4.
Total number of stickers that Vanessa used to decorate the diary
= 14 u + 7 u
= 21 u
21 u = 147
1 u = 147 ÷ 21 = 7
Number of pink stickers that Vanessa used to decorate the diary
= 3 u
= 3 x 7
= 21
Answer(s): 21