A grocer mixes together some cashews costing 8 dollars per kilogram with some Brazil nuts costing 10 dollars per kilogram. The grocer sold 12 kg of the mixture for 8.50 per kilogram. How many kilograms of cashews were in the mixture the grocer sold?

Question

anonymous · Answer

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istim · Answer

That deserves a medal after we get the real answer.

anonymous · Answer

ok fine 
put x = amount of brazil nuts, 
$$12 - x$$ = amount of cashews
total cost is therefore 
$$10x+8(12-x)=12\times 8.5$$ solve for x

istim · Answer

Hey, I can't give 2 medals to the same person bro.

anonymous · Answer

i get 
$$x=3$$ so three pounds of brazil nuts, and the rest cashews