If $70 + m + n - 20 = 80$ and $m = 2n$, then what is the value of $n$?
Question:
If $70 + m + n - 20 = 80$ and $m = 2n$, then what is the value of $n$?
Answer:
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If $70 + m + n - 20 = 80$ and $m = 2n$, then what is the value of $n$?
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