document.write( "Question 371030: solve by elimination
\n" ); document.write( "a+b+c=-3
\n" ); document.write( "3b-c=4
\n" ); document.write( "2a-b-2c=-5
\n" ); document.write( "
\n" ); document.write( "

Algebra.Com's Answer #264377 by Fombitz(32388)\"\" \"About 
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1.\"a%2Bb%2Bc=-3\"
\n" ); document.write( "2.\"3b-c=4\"
\n" ); document.write( "3.\"2a-b-2c=-5\"
\n" ); document.write( "Multiply eq. 1 by (-2) and add to eq. 3,
\n" ); document.write( "\"-2a-2b-2c%2B2a-b-2c=6-5\"
\n" ); document.write( "4.\"-3b-4c=1\"
\n" ); document.write( "Add eq. 2 to eq. 4,
\n" ); document.write( "\"3b-c-3b-4c=4%2B1\"
\n" ); document.write( "\"-5c=5\"
\n" ); document.write( "\"highlight%28c=-1%29\"
\n" ); document.write( "Then from eq. 2,
\n" ); document.write( "\"3b%2B1=4\"
\n" ); document.write( "\"3b=3\"
\n" ); document.write( "\"highlight%28b=1%29\"
\n" ); document.write( "From eq. 1,
\n" ); document.write( "\"a%2B1-1=-3\"
\n" ); document.write( "\"highlight%28a=-3%29\"
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