document.write( "Question 172736: Help me please...
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document.write( "Solve these systems by the elimination method.
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document.write( "x + 6y = -41
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document.write( "-x + 9y = 49\r
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document.write( "5x + 3y = -13
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document.write( "7x - 2y = 11\r
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document.write( "What are the solutions to the system. (Type an ordered pair. Type an integer or a fraction. Type N is there is no solution. Type I if there are infinitely many solutions)\r
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document.write( "Thank you in advance for your help. \n" );
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Algebra.Com's Answer #127584 by Alan3354(69443)![]() ![]() You can put this solution on YOUR website! Solve these systems by the elimination method. \n" ); document.write( "x + 6y = -41 \n" ); document.write( "-x + 9y = 49 \n" ); document.write( "Add the 2 eqns \n" ); document.write( "0x + 15y = 8 \n" ); document.write( "y = 8/15 \n" ); document.write( "--------- \n" ); document.write( "Sub into eqn 1 \n" ); document.write( "x + 6*8/15 = -41 \n" ); document.write( "15x + 48 = -615 \n" ); document.write( "15x = -663 \n" ); document.write( "x = -221/5 \n" ); document.write( "--------- \n" ); document.write( "5x + 3y = -13 \n" ); document.write( "7x - 2y = 11 \n" ); document.write( "Multiply eqn 1 by 2 and eqn 2 by 3 to get 6y in both. \n" ); document.write( "10x + 6y = -26 \n" ); document.write( "21x - 6y = 33 \n" ); document.write( "Add the 2 eqns \n" ); document.write( "31x = 7 \n" ); document.write( "x = 7/31 \n" ); document.write( "-------- \n" ); document.write( "Sub into either to find y.\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |