Problema Solution
Automotive maintenance. The radiator in Natalie’s car contains 6.3 L of antifreeze and water. This mixture is 30% antifreeze. How much of this mixture should she drain and replace with pure antifreeze so that there will be a mixture of 50% antifreeze?
Answer provided by our tutors
Antifreez1 I 80 ---------------- 40 gallons
Antifreeze II 10 ---------------- x gallons
Total 30 ---------------- 40 + x gallons
30*6.3+100*x=50(6.3+x)
189+100x =315+50x
100x-50x =315-189
50x=126
/50
x=2.52 liters 100% Antifreeze