document.write( "Question 415675: Solve by using the elimination method:
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document.write( "5x + 6y=5
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document.write( "10x + 12y=10 \n" );
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Algebra.Com's Answer #291348 by Theo(13342)![]() ![]() You can put this solution on YOUR website! multiply the first equation by 2 to get:\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "10x + 12y = 10\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "your 2 equations are now:\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "10x + 12y = 10 \n" ); document.write( "10x + 12y = 10\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "subtract second equation from first to get:\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "0 + 0 = 0\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "since the equation is true, and all variables have canceled out, the 2 equations are identities meaning that they are really the same equation.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "if you graphed both these equations, they would show up as being the same line.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "take 5x + 6y = 5 and solve for y to get y = -(5/6)x + (5/6)\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "take 10x + 12y = 10 and solve for y to get y = (10/12)x + (10/12)\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "simplify the second equation to get y = (5/6)x + (5/6)\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "same equation will graph as the same line.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "the equations are identical.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "just to s how you, i will graph the 2 equations of y = (5/6)x + (5/6) and y = (10/12)x + (10/12)\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "see below:\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "both equations are identical so the graph of both of these equations looks like the same line.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |