Question

Elena 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? 120 parrotfish, 200 triggerfish 40 parrotfish, 280 triggerfish 20 parrotfish, 140 triggerfish 280 parrotfish, 40 triggerfish

Answer 1

Let t be the number of triggerfish and p be the number of parrotfish
t + p = 320
t = 7p
7p + p = 320
8p = 320
p = 40
There are 40 parrotfish.
p = 40
t = 7(40)
t = 280
There are 280 triggerfish.
Check:
t + p = 320
280 + 40 = 320
320 = 320