<|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 [42, 38, 87, 39], create an equation that equals 67. You can use basic arithmetic operations (+, -, *, /) and each number can only be used once. Find the equation that achieves the target, and as you work through it, show your steps in <think> </think> tags. Finally, return the equation in <answer> </answer> tags, following the same format as the example. <|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>