SOLUTION: For what value(s) of k are the two planes parallel? ( 4x+ 6y−4z=0 −kx + 15y + kz = 2

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Question 1072839: For what value(s) of k are the two planes parallel? ( 4x+ 6y−4z=0
−kx + 15y + kz = 2
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Any value that maintains the 4:6:-4 ratio so for -k:15:k,
6u=15
u=15%2F6=5%2F2
So then,
4%285%2F2%29=-k
k=-10
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-10x%2B15y%2B10z=2