Question 357005
Since with cashew it costs more than pure peanuts, cashews have to be more expensive.
 
 
let p the price of peanuts, and c of cashews, we have 
 
  0.1p*+0.9c=1*p+0.05*p
 
 the price of 10% peanuts and 90% cashews is the price if it were peanuts plus 5% of it.
 
Express c as function of p : 
 
 0.95p = 0.9c => c = .95/.9p = 1.05555p, 
 
 
the price of cashews is the one of peanuts +5.555% = +50/9 %