Answer:
2 fishes
Step-by-step explanation:
If you've got 5 fishes, and 3 die, this leaves behind 2 fishes
It would be 20 so you had it right
Are equation for a rectangle is area = (width x length)
(18x - 12) = 6 x length
length = (18x - 12) / 6
length = 3x - 2
Then put in some butter that will get you out