Homework Help: Algebra

Posted by Sadie on Monday, May 11, 2009 at 7:50pm.

Soybean meal is 18% protein; cornmeal is 9% protein. How many pounds of each should be mixed together in order to get 360 lb mixture that is 12% protein?

Algebra - bobpursley, Monday, May 11, 2009 at 8:06pm
S+C=360
.18S+.09C=360*.12

I recommend solve by substitution.

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