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Prove that the line (x+5)/3=(y+4)/1=(z-7...

Prove that the line `(x+5)/3=(y+4)/1=(z-7)/-2 and x/1=(y+7)/5=(z-16)/-13`are coplanar.

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Show that the lines (x+3)/2=(y+5)/3=(z-7)/-3 and (x+1)/4=(y+1)/5=(z+1)/-1 are co-planar.

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