Question 1022082
Let x be the number of pounds of $9 nuts being sold.  Then 240-x would be the number of pounds of raisins being sold.  The set up looks like this:
9x + 3(240-x) = 5(240)
9x + 720 - 3x = 1200
6x + 720 = 1200
6x = 480
x = 80 pounds of nuts
which means
240-x = 160 pounds of raisins