A triangle has sides of length 5 and 6 units. The length of the third side is $x$ units, where $x$ is an integer. What is the largest possible perimeter of the triangle?
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
A triangle has sides of length 5 and 6 units. The length of the third side is $x$ units, where $x$ is an integer. What is the largest possible perimeter of the triangle?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
21\text{ units}
A triangle has sides of length 5 and 6 units. The length of the third side is $x$ units, where $x$ is an integer. What is the largest possible perimeter of the triangle?
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