document.write( "Question 729412: 4x+4y=5 (2x+8y=-5) \n" ); document.write( "
Algebra.Com's Answer #446150 by checkley79(3341)\"\" \"About 
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4x+4y=5 MULTIPLY BY -2 & ADD.
\n" ); document.write( "2x+8y=-5
\n" ); document.write( "-8X-8Y=-10
\n" ); document.write( "-------------------
\n" ); document.write( "-6X=-15
\n" ); document.write( "X=-15/-6
\n" ); document.write( "X=2.5 ANS.
\n" ); document.write( "4*2.5+4Y=5
\n" ); document.write( "10+4Y=5
\n" ); document.write( "4Y=5-10
\n" ); document.write( "4Y=-5
\n" ); document.write( "Y=-5/4
\n" ); document.write( "Y=-1.25 ANS.
\n" ); document.write( "PROOF:
\n" ); document.write( "2*2.5+8*-1.25=-5
\n" ); document.write( "5-10=-5
\n" ); document.write( "-5=-5 \n" ); document.write( "
\n" );