SOLUTION: A chemical company makes two brands of antifreeze. The first brand is 70% pure antifreeze and the second brand is 95% pure antifreeze. In order to obtain 60 gallons of a mixture th

Algebra ->  Customizable Word Problem Solvers  -> Mixtures -> SOLUTION: A chemical company makes two brands of antifreeze. The first brand is 70% pure antifreeze and the second brand is 95% pure antifreeze. In order to obtain 60 gallons of a mixture th      Log On

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Question 1176272: A chemical company makes two brands of antifreeze. The first brand is 70% pure antifreeze and the second brand is 95% pure antifreeze. In order to obtain 60 gallons of a mixture that contains 85% pure antifreeze, how many gallons of each brand of antifreeze must be used?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
70%, the low concentration
95%, the high concentration
85%, the mix concentration
60 gallons , how much of the mix result


v, amount of the high concentration antifreeze

70%2860-v%29%2B95v=85%2A60
-
70%2A60-70v%2B95v=85%2A60
95v-70v=85%2A60-70%2A60
%2895-70%29v=60%2885-70%29
highlight_green%28v=60%28%2885-70%29%2F%2895-70%29%29%29--------and you can finish from here.