<|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 [9, 20, 100, 7], create a series of equations that equal 53. Each number can only be used once, and you can use basic arithmetic operations (+, -, *, /) for this challenge. Show your work in <think> </think> tags. Your solution should demonstrate how both parts of the equation lead to the target number. Return the final two equations in <answer> </answer> tags, for example <answer> first equation: (12 - 3) + 4 = 13, second equation: 13 * 4 = 52, combined: 52 + 1 = 53 </answer>.<|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>