document.write( "Question 116910: Solve the system using substitution or elimination:\r
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\n" ); document.write( "\n" ); document.write( "3x+2y= -12
\n" ); document.write( "2x+y= -7
\n" ); document.write( "and
\n" ); document.write( "2x-4y= -2
\n" ); document.write( "4x+8y=0 \n" ); document.write( "
Algebra.Com's Answer #85112 by checkley71(8403)\"\" \"About 
You can put this solution on YOUR website!
3X+2Y=-12 NOW MULTIPLY THE OTHER EQUATIOBN BY -2 & ADD THEM
\n" ); document.write( "-4X-2Y=14
\n" ); document.write( "--------------------------
\n" ); document.write( "-X=2
\n" ); document.write( "X=-2 ANSWER.
\n" ); document.write( "3*-2+2Y=-12
\n" ); document.write( "-6+2Y=-12
\n" ); document.write( "2Y=-12+6
\n" ); document.write( "-2Y=-6
\n" ); document.write( "Y=-6/2
\n" ); document.write( "Y=-3 ANSWER.
\n" ); document.write( "PROOF
\n" ); document.write( "2*-2-3=-7
\n" ); document.write( "-4-3=-7
\n" ); document.write( "-7=-7
\n" ); document.write( "-------------------------------------------
\n" ); document.write( "MULTIPLY THE FIRST EQUATION BY 2 & ADD THEM
\n" ); document.write( "4X-8Y=-4
\n" ); document.write( "4X+8Y=0
\n" ); document.write( "----------------
\n" ); document.write( "8X=-4
\n" ); document.write( "X=-4/8
\n" ); document.write( "X=-1/2 ANSWER.
\n" ); document.write( "4*1/2+8Y=0
\n" ); document.write( "2+8Y=0
\n" ); document.write( "8Y=-2
\n" ); document.write( "Y=-2/8
\n" ); document.write( "Y=-1/4 ANSWER.
\n" ); document.write( "PROOF
\n" ); document.write( "2*-1/2-4*-1/4=-2
\n" ); document.write( "-1-1=-2
\n" ); document.write( "-2=-2
\n" ); document.write( " \n" ); document.write( "
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