SOLUTION: how many gallons of 30% antifreeze solution and 60% antifreeze solution must be mixed to obtain 15 gallons of 42% antifreeze solution? _ gallons of 30% _ gallons of 60%

SOLUTION: how many gallons of 30% antifreeze solution and 60% antifreeze solution must be mixed to obtain 15 gallons of 42% antifreeze solution? _ gallons of 30% _ gallons of 60%

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Question 268065: how many gallons of 30% antifreeze solution and 60% antifreeze solution must be mixed to obtain 15 gallons of 42% antifreeze solution?
_ gallons of 30%
_ gallons of 60%
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
.3*x+.6*(15-x)=15*.42
9 gallons of 30 % and
6 gallons of 60 %
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