document.write( "Question 1117714: Obtain an equivalent system by performing the stated elementary operation on the system. Replace the first equation by the sum of itself and 3 times the second
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\n" ); document.write( "\n" ); document.write( "-7x -10y -14z= -35
\n" ); document.write( "6x -9y +3z= -24
\n" ); document.write( "5x +7y +8z= -20 \n" ); document.write( "
Algebra.Com's Answer #732825 by solver91311(24713)\"\" \"About 
You can put this solution on YOUR website!
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document.write( " -7x   -10y  -14z  =  -35\r\n" );
document.write( "  6x   - 9y  + 3z  =  -24\r\n" );
document.write( "  5x   + 7y  + 8z  =  -20\r\n" );
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document.write( "      3R2  =  18x  -27y  + 9z  = - 72\r\n" );
document.write( "       R1  = - 7x  -10y  -14z  = - 35 \r\n" );
document.write( "             ------------------------\r\n" );
document.write( " 3R2 + R1  =  11x  -37y  - 5z  = -107 \r\n" );
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document.write( "  11x   -37y  - 5z  = -107\r\n" );
document.write( "   6x   - 9y  + 3z  =  -24\r\n" );
document.write( "   5x   + 7y  + 8z  =  -20\r\n" );
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\n" ); document.write( "\n" ); document.write( "John
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