If he received a total of $180 for the trout and eels, how many trout did he sell?
Hint 2 Hint 3 Hint 4 Hint 5 Hint 6
Hint 3 Hint 4 Hint 5 Hint 6
Hint 4 Hint 5 Hint 6
Hint 5 Hint 6
Hint 6