<|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 [12, 15, 18, 20, 8], come up with a mathematical equation that yields 58. Remember to only utilize each number once and employ the basic arithmetic operations available. Please break down your process in <think> </think> tags and deliver your answer and the solution in <answer> </answer> tags, like so: <answer> (1 + 2) × 3 = 6 </answer>.<|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>