How many gallons of milk that is 10 percent butter-fat must be added to 8 gallons of milk that is 30 percent butterfat to obtain milk that is 20 percent butterfat?	Choose the correct choice from the following answers:	A) 6	B) 8	C) 14	D) 16	E) 28

Rationale: "equate the fat : 0.1 x + 0.30 * 8 = 0.2 ( x + 8 ) - - > x = 8 . answer : b ."
Answer: B