human
Ali, Peter, and Joey were fishing. The fish Ali caught weighed, in sum, twice as much as the fish that Peter caught. Joey caught 1 kg more fish than Peter. Together the three of them caught 25 kg of fish. How many kilograms did Ali catch?
assistant
How many kg of fish did Ali and Joey catch? ** Let x be the weight of the fish that Peter caught. Then Ali and Joey caught 2*x and x+1 kg of fish, respectively.
Write an equation ** So, x+ 2*x + x+1 =25
Simplify ** So, 4*x = 25 - 1 = 24
Simplify ** So, x = <<6=6>>6
How many kg of fish did Ali catch? ** Therefore, Ali caught 2*x = 2*6 = 12 kg of fish
#### 12