<PRE><B>Question 412887</B>
Soybean meal is 16% protein;cornmeal is 8% protein. How many pounds of each should be mixed together in order to get 320-lb mixture that is 15% protein?

	    percent----------------quantity
Soyabean	16----------------	x
Corn	         8----------------	320-x
Total	        15----------------	320	

16x+8(320-x)=15	*320
16x+2560-8x=4800		
16x-8x=4800-2560		
8x=2240							
/8											
x=280 pounds Soyabean
40 pounds corn

						
	
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