how many pounds of each did he buy?

Question

Bill bought 10 lbs of peanuts and cashews for his party. The cashews cost $ 7/ lb and the peanuts $3/ lbs. Bill spent a total of $50.

 

Answer 1

let P be the weight of peanuts he bought. So the weight of Cashews is 10 - P.

 

3P + 7(10 - P) = 50

 

3P + 70 - 7P = 50

 

3P - 7P = 50 -70

 

-4P = -20

 

P = 5

 

So, Bill bought 5 pounds of peanuts and 5 pounds of cashew.