Winnie baked 72 croissants. ⁵₈ of the croissants were chocolate croissants. The rest were mango croissants. She gave an equal number of chocolate croissants and mango croissants away and had 2 times as many chocolate croissants as mango croissants left. How many croissants did she give away?

	Chocolate croissants	Mango croissants	Difference
Before	5x1 = 5 u	3x1 = 3 u	2x1 = 2 u
Change	- 1 u	- 1 u
After	2x2 = 4 u	1x2 = 2 u	1x2 = 2 u

Since Winnie gave away an equal number of chocolate croissants and mango croissants, the difference in the number of chocolate croissants and mango croissants remains unchanged.  Make the difference in the chocolate croissants and mango croissants the same.  LCM of 2 and 1 is 2.

Total number of croissants at first
= 5 u + 3 u
= 8 u

8 u = 72

1 u = 72 ÷ 8 = 9

Number of croissants that Winnie gave away
= 1 u + 1 u
= 2 u
= 2 x 9 
= 18

Answer(s): 18