<PRE><B>Question 355465</B>
Let A be the amount of 28% fungicide and let B be the amount of 40% fungicide.
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Volume:
1.{{{A+B=300}}}
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Concentration:
{{{28A+40B=36(300)}}}
2.{{{7A+10B=2700}}}
Multiply eq. 1 by (-10) and add to eq. 2 to eliminate B and solve for A.
{{{-10A-10B+7A+10B=-3000+2700}}}
{{{-3A=-300}}}
{{{highlight(A=100)}}}liters
Then from eq. 1,
{{{100+B=300}}}
{{{highlight(B=200)}}}liters
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