<|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 [89, 34, -26, 10], create an equation that equals 279. Show your work using basic arithmetic operations (+, -, *, /). Each number can only be used once in your equation. Provide the equation with each step clearly displayed in <think> </think> tags and conclude your solution in <answer> </answer> tags. Additionally, validate the correctness of your solution using the given numbers. # Countdown Game Challenge<|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>