<PRE><B>Question 200033</B>
Soybean meal is 14% protein. Cornmeal is 7% protein.
 How many pound of each should be mixed together in order to get a 280 lb
 mixture that is 13% protein?
:
Let x = amt of 14% stuff
then
(280-x) = amt of 7% stuff
:
A simple equation:
.14x + .07(280-x) = .13(280)
:
.14x + 19.6 - .07x = 36.4
:
.14x - .07x = 36.4 - 19.6
:
.07x = 16.8
x = {{{16.8/.07}}}
:
x = 240 lb of 14% stuff
then
280 - 240 = 40 lb of 7% stuff
:
:
Check solution
.14(240) = .07(40) = .13(280)
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