document.write( "Question 1015617: Thanks in advanced!\r
\n" ); document.write( "\n" ); document.write( "in which line is a mistake first made when solving the following system of equations by elimination for s?
\n" ); document.write( "2r + 7s = 11
\n" ); document.write( "r - 9s = -7\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Line 1
\n" ); document.write( "2r + 7s = 11
\n" ); document.write( "2(r - 9s = -7)
\n" ); document.write( "Line 2
\n" ); document.write( "2r + 7s = 11
\n" ); document.write( "2r - 18s = -14
\n" ); document.write( "Line 3
\n" ); document.write( "-11s = -3
\n" ); document.write( "Line 4
\n" ); document.write( "s = 11/3 \n" ); document.write( "

Algebra.Com's Answer #631968 by Alan3354(69443) $\"\"$ $\"About$

You can put this solution on YOUR website!
in which line is a mistake first made when solving the following system of equations by elimination for s?
\n" ); document.write( "2r + 7s = 11
\n" ); document.write( "r - 9s = -7\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Line 1
\n" ); document.write( "2r + 7s = 11
\n" ); document.write( "2(r - 9s = -7)
\n" ); document.write( "Line 2
\n" ); document.write( "2r + 7s = 11
\n" ); document.write( "2r - 18s = -14 **************
\n" ); document.write( "------------- Subtract
\n" ); document.write( "25s = 25
\n" ); document.write( "==============================
\n" ); document.write( "Line 3
\n" ); document.write( "-11s = -3
\n" ); document.write( "Line 4
\n" ); document.write( "s = 11/3 \n" ); document.write( "

\n" );