<|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 [61, 13, 5, 31], create an equation that equals 45. You can use basic arithmetic operations (+, -, *, /) and each number can only be used once. You should approach this by first considering if any obvious relationships and save certain numbers or arithmetic operations for the end as they may lead a different path to the target. Additionally, understand that the sequence of operations might need rewriting as (`45 = 13 * (x - 5) + 31` instead of directly calculating as `45 = 13 * 5 + 31`). Show your work in <think> </think> tags. And return the final equation and answer in <answer> </answer> tags, for example <answer> 13 * (61 - 5) + 31 = 45 </answer>.<|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>