<|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 [5, 18, 39, 24], create an equation that equals 42. You can use basic arithmetic operations (+, -, *, /) and each number can only be used once. Show your work in <think> </think> tags. And return the final equation and answer in <answer> </answer> tags, for example <answer> 5 + 18 = 23, 39 - 23 = 16, 16 + 4 = 20, 20 * 2 = 40, 42 - 40 = 2, 2 + 2 = 4, 42 / 2 = 21 </answer>. <|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>