SOLUTION: A car radiator holds 2 gallons of fluid and initially is empty. If a mixture of water and antifreeze contains 70% antifreeze and another mixture contains 15% antifreeze, how much

Question 450058: A car radiator holds 2 gallons of fluid and initially is empty. If a mixture of water and antifreeze contains 70% antifreeze and another mixture contains 15% antifreeze, how much of each should be combined to fill the radiator with a 50% antifreeze mixture?
Answer by jorel1380(3719) (Show Source): You can put this solution on YOUR website!
n+p=2
.7n+.15p=.5(2)=1
70n+15p=100
15n+15p=30
55n=70
n=70/55
p=40/55
You need 14/11 gallons of 70% antifreeze, and 8/11 gallons of 15% antifreeze for your mixture..
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