<|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, 30, 5, 7], craft an equation that sums up to 61. You are permitted to apply basic arithmetic operations such as addition, subtraction, multiplication, and division, and each number can only be used once. Share your work in <think> </think> tags to show your steps. Finally, return the final equation and your answer in <answer> </answer> tags, for example <answer> 12 + 30 = 42, 42 + 5 = 47, 47 + 7 = 61 </answer>. Do you think you can solve this challenge?<|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>