The formula should be 0.3x + 0.7(20-x) = 0.4(20) Simplifying it would get 3x + 7(20-x) = 4(20) and: 3x + 140 - 7x = 80 then: 4x = 60 x = 15 So then for the 30% solution: 15 quarts And for the 40%: 5 quarts
Answer:16x-4. You add all the numbers with common terms first, such as all the xs together. Then you add all the numbers without an x in front and tada!