
306 gallons of milk containing 6% butterfat contain 18.36 gallons of butterfat.
x - the number of gallons of 7% milk
y - the number of gallons of 4% milk

204 gallons of 7% milk and 102 gallons of 4% milk should be used.
Answer:
16.8
Step-by-step explanation:
3x+2y
3(4)+2(2.4)
12+4.8
16.8
Subtract 4 from both sides. You'll get 8x = 28. Solving for x, x = 28/8 = 7/2