document.write( "Question 534615: Solve using the substitution method. Show your work. If the system has no solution or an infinite number of solutions, state this.
\n" ); document.write( "\"11x+%2B+10y+=+77\"\r
\n" ); document.write( "\n" ); document.write( "\"9x+%2B+y+=+63\"
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Algebra.Com's Answer #356052 by JBarnum(2146)\"\" \"About 
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\"9x+%2B+y+=+63\"
\n" ); document.write( "\"y+=+highlight%2863-9x%29\"
\n" ); document.write( ".
\n" ); document.write( "\"11x+%2B+10y+=+77\"
\n" ); document.write( "\"11x+%2B+10+%28highlight%2863-9x%29%29+=+77\"
\n" ); document.write( "\"11x+%2B+630-90x+=+77\"
\n" ); document.write( "\"630-79x+=+77\"
\n" ); document.write( "\"553=+79x\"
\n" ); document.write( "\"7=x\"
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