document.write( "Question 548900: 2x+8y=10
\n" ); document.write( "7x-8y=-73
\n" ); document.write( "solve by the elimination method \n" ); document.write( "

Algebra.Com's Answer #357265 by oberobic(2304) $\"\"$ $\"About$

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2x +8y = 10
\n" ); document.write( "7x -8y = -73
\n" ); document.write( "------------- add the two equations
\n" ); document.write( "9x = -63
\n" ); document.write( "x = -7
\n" ); document.write( ".
\n" ); document.write( "substitute x = -7 to find 'y'
\n" ); document.write( ".
\n" ); document.write( "2(-7) +8y = 10
\n" ); document.write( "8y = 10 + 14
\n" ); document.write( "y = 3
\n" ); document.write( ".
\n" ); document.write( "(-7,3)
\n" ); document.write( ".
\n" ); document.write( "substitute into the second equation to determine if this answer is correct
\n" ); document.write( "7(-7) -8(3) = -73 ??
\n" ); document.write( "-49 -24 = -73
\n" ); document.write( "Correct.
\n" ); document.write( ".
\n" ); document.write( "Done. \n" ); document.write( "

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