document.write( "Question 164735: y = 3x + 6
\n" ); document.write( "-6x + 2y = 12\r
\n" ); document.write( "\n" ); document.write( "Solve by using the substitution method
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Algebra.Com's Answer #121397 by checkley77(12844)\"\" \"About 
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y = 3x + 6
\n" ); document.write( "-6x + 2y = 12
\n" ); document.write( "-6x+2(3x+6)=12
\n" ); document.write( "-6x+6x+12=12
\n" ); document.write( "0=12-12
\n" ); document.write( "0=0 no solution as both equations are the same equation.\r
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