[" 69.The lines "x+y+z-3=0=2x-y+5z-6" an...

[" 69.The lines "x+y+z-3=0=2x-y+5z-6" and "],[x-y-z+1=0=2x+3y+7z-k" are coplanar "],[" then "k" equals "],[[" (1) "10," (2) "11],[" (3) "12," (4) "13]]

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