Vanessa used ⁴₇ of her gold stickers and ³₄ of her silver stickers to decorate her diary. In the end, she had an equal number of gold stickers and silver stickers left. Given that Vanessa had a total of 171 gold and silver stickers at first, how many silver stickers did she use to decorate the diary?

	Gold stickers	Silver stickers
Before	7x1 = 7 u	4x3 = 12 u
Change	- 4x1 = - 4 u	- 3x3 = - 9 u
After	3x1 = 3 u	1x3 = 3 u

The number of gold stickers and silver stickers in the end is the same.  Make the number of gold stickers and silver stickers in the end the same.  LCM of 3 and 1 is 3.

Total number of stickers that Vanessa used to decorate the diary
= 7 u + 12 u
= 19 u

19 u = 171

1 u = 171 ÷ 19 = 9

Number of silver stickers that Vanessa used to decorate the diary
= 9 u
= 9 x 9
= 81

Answer(s): 81