document.write( "Question 620728: if x/3y=4/7 and z/5y=2/21, then x/z=? \n" ); document.write( "

Algebra.Com's Answer #390356 by Maths68(1474) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"x%2F3y=4%2F7\"$
\n" ); document.write( " $\"z%2F5y=2%2F21\"$
\n" ); document.write( " $\"x%2Fz=%22%3F%22\"$ \r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " $\"x%2F3y=4%2F7\"$
\n" ); document.write( " $\"x=4%283y%29%2F7\"$
\n" ); document.write( " $\"x=12y%2F7\"$ .............(1)\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " $\"z%2F5y=2%2F21\"$
\n" ); document.write( " $\"z=%285y%292%2F21\"$
\n" ); document.write( " $\"z=10y%2F21\"$ ..............(1)
\n" ); document.write( "Divide x by z, we have
\n" ); document.write( " $\"x%2Fz=%2812y%2F7%29%2F%2810y%2F21%29\"$
\n" ); document.write( " $\"x%2Fz=%2812y%2F7%29%2821%2F10y%29\"$
\n" ); document.write( " $\"x%2Fz=%28cross%2812y%29%2Fcross%287%29%29%28cross%2821%29%2Fcross%2810y%29%29\"$
\n" ); document.write( " $\"x%2Fz=%286%2F1%29%283%2F5%29\"$
\n" ); document.write( " $\"x%2Fz=18%2F5\"$
\n" ); document.write( " $\"x%2Fz=3%263%2F5\"$
\n" ); document.write( " \n" ); document.write( "

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