document.write( "Question 974920: Solve for x,y,z if (x+y)(y+z)=18,(y+z)(z+x)=30,(x+y)(x+z)=15 \n" ); document.write( "
Algebra.Com's Answer #596803 by JoelSchwartz(130)\"\" \"About 
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(x+y)=18/(y+z)
\n" ); document.write( "x+y=15/(x+z)
\n" ); document.write( "18/(y+z)=15/(x+z)
\n" ); document.write( "(18(x+z))/(y+z)=15
\n" ); document.write( "18(x+z)=15(y+z)
\n" ); document.write( "(y+z)=30/(z+x)
\n" ); document.write( "18(x+z)=15*(30/(z+x))
\n" ); document.write( "18(z+x)^2=15*30
\n" ); document.write( "(z+x)^2=25
\n" ); document.write( "z+x=+-5
\n" ); document.write( "5(y+z)=30
\n" ); document.write( "y+z=6
\n" ); document.write( "5(x+y)=15
\n" ); document.write( "x+y=3
\n" ); document.write( "x=3-y
\n" ); document.write( "z+3-y=5
\n" ); document.write( "z-y=2
\n" ); document.write( "z=2+y
\n" ); document.write( "y+2+y=6
\n" ); document.write( "2y=4
\n" ); document.write( "y=2
\n" ); document.write( "z=4
\n" ); document.write( "x=1\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "
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