Question 1143970
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..., feed is 20% protein and a feed supplement is 60% protein. How much of each must be combined to get 3600 pounds of feed that is 30% protein?
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x, amount of the 60% protein feed
3600-x, amount of the 20% protein feed


{{{60x+20(2600-x)=30*3600}}}
Simplify and solve.