Question

How many gallons of pure alcohol should be added to 192 gallons of 15% alcohol solution to produce a solution that is 36%?

Answer 1

Hi,

Explanation:

Let's say x the number of gallons at 100% alcohol to be added:

`192*(15)/(100) +x*(100)/(100) =(192+x)*(36)/(100) \\\\100x-36x=192*36-192*15\\\\64x=4032\\\\x=63\\`