Question

A chemical company makes two brands of antifreeze the first brand contains 65% pure antifreeze and the second brand contains 80% pure antifreeze in order to obtain 60 gallons of a mixture that contains 70% pure antifreeze how many gallons of each brand of antifreeze must be used

Answer 1

30 gallons of each brand

Explanation:

1 gallon of 60% + 1 gallon of 80% = 2 gallons 70% (60/2 = 30)