document.write( "Question 734566: 1/2x-1/4y=-1
\n" ); document.write( "2(y-1)-2(1-x)=y+4 \n" ); document.write( "

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1/2x-1/4y=-1
\n" ); document.write( "2(y-1)-2(1-x)=y+4
\n" ); document.write( "Multiply the first equation x4:
\n" ); document.write( "2x-y=-4
\n" ); document.write( "Remove the brackets in the second equation:
\n" ); document.write( "2y-2-2+2x=y+4
\n" ); document.write( "y+2x=8
\n" ); document.write( "now the equations :
\n" ); document.write( "2x-y=-4
\n" ); document.write( "y+2x=8
\n" ); document.write( "Add the two equations :
\n" ); document.write( "4x =4 , Hence x=1
\n" ); document.write( "then :
\n" ); document.write( "y =6 \n" ); document.write( "

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