In a stall, some frisbees and jigsaw puzzles were on sale. ¹₁₀ of the items were frisbees. ²₃ of the frisbees and 148 jigsaw puzzles were sold. There were ¹₉ of the items left in the stall. How many frisbees and jigsaw puzzles were there in the stall at first?

	Frisbees	Jigsaw puzzles	Total
Comparing frisbees  and jigsaw puzzles at first	1x9 = 9 u	9x9 = 81 u	10x9 = 90 u
Before	3x3 =  9 u		9x10 = 90 u
Change	- 2x3 = - 6 u	- 148	- 8x10 = - 80 u
After	1x3 = 3 u	7 u	1x10 = 10 u

 
The total number of toys at first is repeated.  Make the total number of toys at first the same. LCM of 10 and 9 is 90.

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

Number of jigsaw puzzles left
= 10 u - 3 u
= 7 u

Number of jigsaw puzzles sold
= 81 u - 7 u
= 74 u

74 u = 148

1 u = 148 ÷ 74 = 2

Number of frisbees and jigsaw puzzles at first
= 90 u
= 90 x 2
= 180

Answer(s): 180