document.write( "Question 1072839: For what value(s) of k are the two planes parallel? ( 4x+ 6y−4z=0
\n" ); document.write( "−kx + 15y + kz = 2
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Algebra.Com's Answer #687686 by Fombitz(32388) $\"\"$ $\"About$

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Any value that maintains the 4:6:-4 ratio so for -k:15:k,
\n" ); document.write( " $\"6u=15\"$
\n" ); document.write( " $\"u=15%2F6=5%2F2\"$
\n" ); document.write( "So then,
\n" ); document.write( " $\"4%285%2F2%29=-k\"$
\n" ); document.write( " $\"k=-10\"$
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\n" ); document.write( " $\"-10x%2B15y%2B10z=2\"$ \r
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