SOLUTION: a peanut co. wants to mix 20lbs. of peanuts worth $3 a lb. with cashews worth $5 a lb. in order to make a a mix worth $3.50 a lb. how many lbs. of cashews should be added to the pe

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Question 280767: a peanut co. wants to mix 20lbs. of peanuts worth $3 a lb. with cashews worth $5 a lb. in order to make a a mix worth $3.50 a lb. how many lbs. of cashews should be added to the peanuts?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
20*3+5*c=3.5(20+c)
c=6 2/3
check
3*20+5*20/3=7/2*80/3
ok