jon caught 3 fish that weighed 186. The total weight was 6 times the weight of the amberjack, The kingfish weighed twice as much as the amberjack. Jon also caught a tarpon. How much did each fish weigh?
compare what we know:
amberjack + kingfish + tarpon = 186
186/6 = amberjack
kingfish = 2*amberjack
tarpon = 186 - amberjack and kingfish
amberjack looks easiest: 186/6 = 31
using the new info we find the kingfish = 2*31 = 62
tarpon = 186 - amberjack and kingfish remember?
so, 186 - 31 - 62 = 93
check
amberjack + kingfish + tarpon = 186
31 + 62 + 93 = 186