document.write( "Question 249056: SOLVE EACH SYSTEM BY SUBSTITUTION
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document.write( "[x=y-8
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document.write( "[-x-y=0 \n" );
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Algebra.Com's Answer #181457 by tutorcecilia(2152) You can put this solution on YOUR website! x=y-8 [substitue this equation into the second equation wherever there is an \"x\"]\r \n" ); document.write( "\n" ); document.write( "-x-y=0 [second equation] \n" ); document.write( "-(y-8)-y=0 [plug-in first equation for \"x\"] \n" ); document.write( "-y+8-y=0 [solve for the y-value] \n" ); document.write( "-2y+8=0 \n" ); document.write( "-2y=-8 \n" ); document.write( "-2y/-2=-8/-2 \n" ); document.write( "y=4 \n" ); document.write( "check by plugging \"x\" back into either equation. \n" ); document.write( " |