SOLUTION: how many gallons of 60% antifreeze solution must be mixed with 100 gallons of 10% antifreeze to get a mixture that is 50% antifreeze?

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Question 458618: how many gallons of 60% antifreeze solution must be mixed with 100 gallons of 10% antifreeze to get a mixture that is 50% antifreeze?
Answer by jorel1380(3719) About Me  (Show Source):
You can put this solution on YOUR website!
.6(n)+10=.5(n+100)
.6n+10=.5n+50
.1n=40
n=40/.1=400
400(.6)+100(.1)=500(.5)
You need 400 gallons of 60% antifreeze to make your coolant..