The store at which Andy usually shops is having a sale. Roast beef now costs $4 a pound and shrimp now costs $10 a pound. Let x be the cost of roast beef and y be the cost of shrimp.
Write an equation to describe the different possible combinations of roast beef and shrimp that Andy can buy for $96.
The equation is _______ .
If Andy bought no roast beef, he could buy _______ pounds of shrimp.
If Andy bought no pounds of shrimp, he could buy _______ pounds of roast beef.