Let $P=(a,b)$ be the point of intersection of the line $y=2x-10$ and the line through $(7,8)$ and $(9,0)$.  Compute $a+b$.
Question:
Let $P=(a,b)$ be the point of intersection of the line $y=2x-10$ and the line through $(7,8)$ and $(9,0)$.  Compute $a+b$.
Answer:
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Let $P=(a,b)$ be the point of intersection of the line $y=2x-10$ and the line through $(7,8)$ and $(9,0)$.  Compute $a+b$.
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