Soybean meal is 16% protein; Cornmeal is 8% protein. How many pound of each should be mixed together to get a 320lb that is 13% protein

Question

anonymous · Answer

i think i have seen this so many times i could do it in my sleep.  your equation is 
$$.16x+.08(320-x)=320\times .13$$

anonymous · Answer

because if x represents soybeans then it contributes .16 x amount of protein. and if x is amount of soybeans and total is 320 that leaves 320-x of cornmeal which has .08(320-x) protein.  the total is 13% of 320 which is .13 times 320  now to solve

pooh · Answer

so x is 200

anonymous · Answer

get 
$$.16x+25.6-.08x=41.6$$
yes you got it!

pooh · Answer

but that only gives me one answer I need to know how much soybean and how much corn meal

anonymous · Answer

Soybean 200
 Cornmeal 120

anonymous · Answer

i put x = amount of soybeans and found x = 200 
since the total is 320 we know the rest yest?

anonymous · Answer

I solve this problem a few minute ago, let me find and copy for you

anonymous · Answer

http://openstudy.com/groups/mathematics/updates/4e23598b0b8ba00f8f00d700#/groups/mathematics/updates/4e234f060b8ba00f8f00d423

pooh · Answer

Thanks both of you have been a great help

anonymous · Answer

urwc