Help
Elena has bought 320 tropical fish for a museum display. She bought 7 times as many triggerfish as parrotfish. How many of each type of fish did she buy?
(Points : 1)
280 parrotfish, 40 triggerfish
20 parrotfish, 140 triggerfish
120 parrotfish, 200 triggerfish
40 parrotfish, 280 triggerfish

Question

Help
Elena has bought 320 tropical fish for a museum display.  She bought 7 times as many triggerfish as parrotfish.  How many of each type of fish did she buy?
(Points : 1)
       280 parrotfish, 40 triggerfish
       20 parrotfish, 140 triggerfish
       120 parrotfish, 200 triggerfish
       40 parrotfish, 280 triggerfish

anonymous · Answer

x + 7y = 320
             y = 7x