Question 157661
1 gallon = 128 fluid ounces
If I add x ounces of 100% acid to create 6% acidity,
the equation to solve is
{{{6=(128(5)+x(100))/(128+x)}}}
Solve for x.
{{{6(128+x)=(128(5)+x(100))}}}
{{{768+6x=640+100x}}}
{{{-94x=-128}}}
{{{x=128/94=64/47}}}
Approximately,
x=1.36 fluid ounces