An adhesive dealer receives an order for 2920 pounds of an adhesive solution containing 15% polymer by weight. On hand is 493 pounds of 9% solution and very large quantities of 23% solution and pure solvent. Calculate the weight of the pure solvent (in pounds) that must be blended with the rest of the components to fill this order. Use all of the 9% solution.

Sinc ethis is homework... what do you think the answer is and how did you arrive at it?