document.write( "Question 1107069: The midpoint of xy is z, if xy=3n and xz=n+15, what is yz? \n" ); document.write( "
Algebra.Com's Answer #722072 by ankor@dixie-net.com(22740)\"\" \"About 
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The midpoint of xy is z, if xy=3n and xz=n+15, what is yz?
\n" ); document.write( ":
\n" ); document.write( "x------z------y
\n" ); document.write( "|-----3n------|
\n" ); document.write( "|-n+15-|
\n" ); document.write( ":
\n" ); document.write( "\"%283n%29%2F2\" = n + 15
\n" ); document.write( "3n = 2(n+15)
\n" ); document.write( "3n = 2n + 30
\n" ); document.write( "3n - 2n = 30
\n" ); document.write( "n = 30
\n" ); document.write( "therefore
\n" ); document.write( "xy = 30 + 15
\n" ); document.write( "xy = 45
\n" ); document.write( "xy = yz, therefore
\n" ); document.write( "yz = 45 \n" ); document.write( "
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