What was the question for this implicit rationale, and corresponding answer?
She spent 150 / 2 = $75 on hockey skates. Let X be the amount Inez spent on hockey pads. 150 - 75 - X = 25. 75 - X = 25. X = 50. The hockey pads cost $50.
 The answer: 50
The question: Inez has $150. She spends one-half on hockey skates and a certain amount on hockey pads. If Inez has $25 remaining, how much did the hockey pads cost, together, in dollars?