Keith and Blaine went fishing. Blaine caught 5 fish while Keith caught twice as many as Blaine's. How many fish did they catch together?
How many fish did Keith catch? ** Keith caught 5 x 2 = <<5*2=10>>10 fish.
How many fish did they catch together? ** Therefore, they caught a total of 5 + 10 = <<5+10=15>>15 fish.
#### 15