Here is the question, I can''t figure out how to explain this algebraically.
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Have you tried it? Can you show us what you have got so far? – Julian Rachman Jan 26 '15 at 01:43
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Are those the equations of lines? $5y-3=0$, $4y+x=0$? – Tejas Jan 26 '15 at 03:10
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@Tejas I certainly hope those aren't equations of lines, because then two of the lines would be $7=0$ and $14=0$. They are lengths of the line segments for some values $x$ and $y$. – Théophile Jan 26 '15 at 03:18