The variable x represents the number of angelfish Carlos bought and the variable y represents the number of parrotfish he bought.

Carlos bought 405 tropical fish for a museum display. He bought 8 times as many parrotfish as angelfish. How many of each type of fish did he buy?

Which system of equations models this problem?

{x−y=405y=8x

{x+y=405y=8x

{x+y=8y=405x

{x+4y=8y=405x