If $4u-5v=23$ and $2u+4v=-8$, find the value of $u+v$.
Question:
If $4u-5v=23$ and $2u+4v=-8$, find the value of $u+v$.
Answer:
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If $4u-5v=23$ and $2u+4v=-8$, find the value of $u+v$.
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