Let $v$, $w$, $x$, $y$, and $z$ be the degree measures of the five angles of a pentagon.  Suppose $v<w<x<y<z$ and $v$, $w$, $x$, $y$, and $z$ form an arithmetic sequence. Find the value of $x$.
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Let $v$, $w$, $x$, $y$, and $z$ be the degree measures of the five angles of a pentagon.  Suppose $v<w<x<y<z$ and $v$, $w$, $x$, $y$, and $z$ form an arithmetic sequence. Find the value of $x$.
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
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Let $v$, $w$, $x$, $y$, and $z$ be the degree measures of the five angles of a pentagon.  Suppose $v<w<x<y<z$ and $v$, $w$, $x$, $y$, and $z$ form an arithmetic sequence. Find the value of $x$.
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