document.write( "Question 586031: use substitution.
\n" ); document.write( "y=6x
\n" ); document.write( "2x+3y=-20
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Algebra.Com's Answer #373575 by Alan3354(69443)\"\" \"About 
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use substitution.
\n" ); document.write( "y=6x
\n" ); document.write( "2x+3y=-20
\n" ); document.write( "------------
\n" ); document.write( "Sub for y in the 2nd equation.
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