<|im_start|>system
You are a helpful assistant. You first thinks about the reasoning process in the mind and then provides the user with the answer.<|im_end|>
<|im_start|>user
Using the numbers [17, 79, 42, 31], create an equation that equals 55. You can use basic arithmetic operations (+, -, *, /) and each number can only be used once. Show your work in <think> </think> tags. Each equation you provide should be distinct, and you should have no more than a total of five complete equations. Return the equations and answers in <answer> </answer> tags, with each sequence being separated by a new line. <|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>