We will use a system of equation for this one. P=Peanuts; C=Cashews P+C=20 This represents the pounds. 10P+9C=191 We can make the first equation equal C. C=20-P 10P+9(20-P)=191 10P+180-9P P+180=191 P=11 There are 11 pounds of peanuts, which means there's 9 pounds of cashews.