Question 339125
Let A be the amount of 25% acid solution, B the amount of 50% acid solution.
1.{{{A+B=100}}}
.
.
.
{{{25A+50B=40(100)}}}
{{{25A+50B=4000}}}
2.{{{A+2B=160}}}
Subtract eq. 1 from eq. 2,
{{{A+2B-A-B=160-100}}}
{{{highlight(B=60)}}}ounces
Then from eq. 1,
{{{A+60=100}}}
{{{highlight(A=40)}}}ounces