Explanation: Assume that the number of pounds in her supply is x. We are given that: She uses 1/3 x in salted mix and 2/9 x in unsalted mix. This means that: Total amount used = 1/3 x + 2/9 x = 5/9 x of her supply
Now, we are also given that: She used 10 pounds of her supply. This means that: 5/9 x = 10 5x = 9*10 = 90 x = 18 pounds
1/3=6/18 and 2/9=4/18 add these 2 fractions together to get 10/18 therefore she used 10 pounds but had 18 pounds of sunflower seed supply in total. Have a good day:)
