Question

Siti and Xinyi had the same number of stickers. After Siti gave away 55 stickers

and Xinyi threw away 15 stickers, Xinyi had three times as many stickers as Siti.
How many stickers did Xinyi have in the end?

Answer 1

Answer: 60 stickers

Explanation:

Let's say Siti is s and Xinyi is x.

3(s - 55) = x - 15

And since s = x, we can just say that 3s - 165 = s - 15

2s = 150

s = 75

So, now Xinyi has 75 - 15 = 60 stickers.