In a kiosk, some toy cars and rubik's cubes were on sale. ¹₂ of the items were toy cars. ²₃ of the toy cars and 70 rubik's cubes were sold. There were ¹₉ of the items left in the kiosk. How many toy cars and rubik's cubes were there in the kiosk at first?

	Toy cars	Rubik's cubes	Total
Comparing toy cars  and rubik's cubes at first	1x9 = 9 u	1x9 = 9 u	2x9 = 18 u
Before	3x3 =  9 u		9x2 = 18 u
Change	- 2x3 = - 6 u	- 70	- 8x2 = - 16 u
After	1x3 = 3 u	-1 u	1x2 = 2 u

 
The total number of toys at first is repeated.  Make the total number of toys at first the same. LCM of 2 and 9 is 18.

The number of toy cars at first is repeated.  Make the number of toy cars the same. LCM of 9 and 3 is 9. 

Number of rubik's cubes left
= 2 u - 3 u
= -1 u

Number of rubik's cubes sold
= 9 u - -1 u
= 10 u

10 u = 70

1 u = 70 ÷ 10 = 7

Number of toy cars and rubik's cubes at first
= 18 u
= 18 x 7
= 126

Answer(s): 126