Problema Solution
how many gallons of 40% antifreeze should be mixed with 10 gallons of 85%antifreeze to obtain a 65% antifreeze mixture?
Answer provided by our tutors
Let the amount of 40% mixed = x gallons
total = 10+x gallons
65 = (40x + 850)/(10+x)
=> 650-850 = 40x-65x
=> x = 8 gallons