Question 342331
Let A be the amount of soybeans, B the amount of cornmeal.
Write an equation for the total weight of the mixture.
1.{{{A+B=360}}}
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Write an equation for the total protein content of the mixture.
{{{18A+9B=11(360)}}}
2.{{{2A+B=440}}}
Subtract eq. 1 from eq. 2,
{{{2A+B-A-B=440-360}}}
{{{highlight(A=80)}}}
Then from eq. 1,
{{{80+B=360}}}
{{{highlight(B=280)}}}
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Use 80 lbs of soybeans, 280 lbs of cornmeal.