document.write( "Question 666683: Solve the system by substitution.\r
\n" ); document.write( "\n" ); document.write( "2x-y+z=-4
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\n" ); document.write( " z=5\r
\n" ); document.write( "\n" ); document.write( "-2x+3y-z=-10\r
\n" ); document.write( "\n" ); document.write( "answers:\r
\n" ); document.write( "\n" ); document.write( "A). (-8,7,5)
\n" ); document.write( "B). (-8,-7,5)
\n" ); document.write( "C). (8,-7,5)
\n" ); document.write( "D). (-8,-7,-5) \n" ); document.write( "

Algebra.Com's Answer #414613 by ewatrrr(24785) $\"\"$ $\"About$

You can put this solution on YOUR website!

 
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document.write( "Hi,
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document.write( "2x-y+z=-4    ||  z=5 
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document.write( "-2x+3y-z=-10 ||   z=5 
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document.write( " 
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document.write( "2x - y = -9       
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document.write( "-2x + 3y = -5    || Adding to eliminate x
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document.write( "     2y = -14
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document.write( "      y = -7  and x = -8     \n" );
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