document.write( "Question 44575: Solve the system by addition\r
\n" ); document.write( "\n" ); document.write( "2x-4y=7\r
\n" ); document.write( "\n" ); document.write( "4x+2y=9
\n" ); document.write( "

Algebra.Com's Answer #29530 by venugopalramana(3286)\"\" \"About 
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2x-4y=7......................I
\n" ); document.write( "4x+2y=9.................II
\n" ); document.write( "EQN.I+EQN.II*2
\n" ); document.write( "2X-4Y+8X+4Y=7+18=25
\n" ); document.write( "10X=25
\n" ); document.write( "X=25/10=2.5
\n" ); document.write( "4*2.5+2Y=9
\n" ); document.write( "2Y=9-10=-1
\n" ); document.write( "Y=-1/2=-0.5
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