document.write( "Question 118723: Please help with this question--What is the x co-ordinate of the system of equations ? 2x + y = 3 and x - 2y = 4.\r
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document.write( "Thanking you
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document.write( "Gloria \n" );
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Algebra.Com's Answer #86861 by m.hansen(16)![]() ![]() ![]() You can put this solution on YOUR website! 2x + y = 3 \n" ); document.write( "x - 2y = 4\r \n" ); document.write( "\n" ); document.write( ":: if we want the x coordinate, we have to get rid of the y \n" ); document.write( ":: if we multiply the top equation by 2, the y becomes 2y, \n" ); document.write( ":: which will cancel the -2y in the second equation \n" ); document.write( "top equ * 2: \n" ); document.write( "4x + 2y = 6 \n" ); document.write( ":: now the new top equation and the original bottom equation \n" ); document.write( "4x + 2y = 6 \n" ); document.write( "x - 2y = 4 \n" ); document.write( ":: add these two equations \n" ); document.write( "5x + 0 = 10 \n" ); document.write( "5x = 10 \n" ); document.write( ":: divide both sides by 5 \n" ); document.write( "x = 2 \n" ); document.write( " |