Answer:
Blair caught 9 fish, and Jay caught 18 fish.
Explanation:
Let b = number of fish Blair caught.
Jay caught 2 times as many fish as Blair, so Jay caught 2b fish.
Together, they caught b + 2b fish.
Together, they caught 27 fish.
b + 2b = 27
3b = 27
b = 9
2b = 18
Blair caught 9 fish, and Jay caught 18 fish.