document.write( "Question 41066: Solve the system by elimination. If the system is inconsistent or has dependent equations, say so.\r
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document.write( "-7x + 5y = -20\r
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document.write( "-3x - 2y = 8 \n" );
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Algebra.Com's Answer #26483 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! 1st: -7x + 5y = -20 \n" ); document.write( "2nd: -3x - 2y = 8 \r \n" ); document.write( "\n" ); document.write( "To eliminate the y-terms do as follows: \n" ); document.write( "Multiply 1st thru by 2 to get: \n" ); document.write( "1st: -14x+10y=-40 \n" ); document.write( "Multiply 2nd thru by 5 to get: \n" ); document.write( "2nd: -15x-10y=40\r \n" ); document.write( "\n" ); document.write( "Add these two equations to get: \n" ); document.write( "-29x=0 \n" ); document.write( "x=0 \n" ); document.write( "Substitute that value into original 1st or 2nd to solve for \"y\". \n" ); document.write( "-7(0)+5y=-20 \n" ); document.write( "y=-4 \n" ); document.write( "SOLUTION: x=0,y=4 \n" ); document.write( "Cheers, \n" ); document.write( "stan H. \n" ); document.write( " \n" ); document.write( " |