Answer: Joy sold 24 skeins of wool.
Explanation:
First you have to see how much of the money she has total came from the synthetic yarn profit.
If she sold 16 skeins of synthetic yarn you multiply 16 x 9(the price per skein of synthetic yarn) to get 144.
Next you subtract 144 from 432 (432-144) to get 288.
Finally, divide 288 by 12(the price of a skein of wool yarn) to get 24.
24 is the amount of skeins of wool yarn she sold.
To be sure you can multiply 24 x 12 (wool yarn sold) and add that to 16 x 9 (synthetic yarn sold) to get 432 which is your total profit.
Hope this helps!
