Elijah brought a total of 16 pounds of peanuts and cashew nuts and paid $49.50 if peanuts cost $2.75 per pound and cashews nuts cost $3.25 per pound how many pounds of cashews nuts did he buy
p + c = 16
275p + 325c = 4950
275 p + 325 c = 4950
275 p + 275 c = 4400
50c = 550
c = 11
11 pounds