SOLUTION: How do I solve this? Two different gasohol mixtures are available. One contains 5% alcohol and the other 12% alcohol. How much of each should be mixed to obtain 500 gallons of

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Question 442263: How do I solve this?
Two different gasohol mixtures are available. One contains 5% alcohol and the other 12% alcohol. How much of each should be mixed to obtain 500 gallons of gasohol containing 10% alcohol?
Thanks in advance.

Answer by rwm(914) About Me  (Show Source):
You can put this solution on YOUR website!
x+y=500
.05x+.12y=.10*500
x=142.857, y=357.143