Let's bear in mind that 5 gallons with a solution of 6% bleach, contains some water plus some bleach, how much bleach? well, is just 6% of 5 gallons or namely (6/100) * 5 gallons, or 0.30 gallons.
if we use "x" gallons of water, well pure water has no bleach, so is 0% bleach, and it has a (0/100) * x or 0x gallons of bleach.
the mixture will be say "y" gallons, and is 4% bleach, so (4/100) * y is 0.04y gallons in the mixture of bleach.
The answer is 12 youre welcome
First you put your 2,000 lb. Then you subtract 170lb from it.
2,000 - 170 = 1,830. So you have 1,830 available for freight.
1,830 divided by 69 = 26.5.
Since you can't cut a box in half, and you don't want to overload your lift, your answer is 26 boxes.