Question 323013
Let S be the amount of soybeans, C cornmeal.
1.{{{S+C=360}}}
2.{{{18S+9C=17(360)}}}
From eq. 1,
{{{S=360-C}}}
Substitute into eq. 2,
{{{18(360-C)+9C=17(360)}}}
{{{18(360)-18C+9C=17(360)}}}
{{{-9C=17(360)-18(360)}}}
{{{-9C=-360}}}
{{{C=40}}}
Then from eq. 1,
{{{S+40=360}}}
{{{S=320}}}
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320 lbs of soybean, 40 lbs of cornmeal.