document.write( "Question 452488: Solve by the substitution method.
\n" ); document.write( "2x+9y=20
\n" ); document.write( " x=8-4y\r
\n" ); document.write( "\n" ); document.write( "What is the solution of the system, if there is one?\r
\n" ); document.write( "\n" ); document.write( "A. The solution is ____.
\n" ); document.write( "B. There is no solution.
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Algebra.Com's Answer #311041 by josmiceli(19441)\"\" \"About 
You can put this solution on YOUR website!
\"+2x+%2B+9y+=+20+\"
\n" ); document.write( "\"+x+=+8+-+4y+\"
\n" ); document.write( "\"+2%2A%288+-+4y%29+%2B+9y+=+20+\"
\n" ); document.write( "\"+16+-+8y+%2B+9y+=+20+\"
\n" ); document.write( "\"+y+=+4+\"
\n" ); document.write( "and
\n" ); document.write( "\"+x+=+8+-+4y+\"
\n" ); document.write( "\"+x+=+8+-+4%2A4+\"
\n" ); document.write( "\"+x+=+-8+\"
\n" ); document.write( "check answers:
\n" ); document.write( "\"+2x+%2B+9y+=+20+\"
\n" ); document.write( "\"+2%2A%28-8%29+%2B+9%2A4+=+20+\"
\n" ); document.write( "\"+-16+%2B+36+=+20+\"
\n" ); document.write( "\"+20+=+20+\"
\n" ); document.write( "OK
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