Jenna catches an eel that's 1/3 as long as Bill's. If the combined length of their eels is 64 inches, how long is Jenna's eel? Think carefully first, then make a decision:
Let j be the length of Jenna's eel and b be the length of Bill's eel. We know that b = 3j and b + j = 64. Substituting the first equation into the second equation, we get 3j + j = 64. Combining like terms, we get 4j = 64. Dividing both sides by 4, we get j = 16. So, the answer is 16.