document.write( "Question 695910: Im working on solving linear equations by elimination.\r
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document.write( "whats 2x-y=9 and 3x+4y=-14 \n" );
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Algebra.Com's Answer #428686 by ReadingBoosters(3246)![]() ![]() ![]() You can put this solution on YOUR website! Multiply the first equation by 4, to have the same y coefficents in differing signs, then add the equaitons and solve for x \n" ); document.write( "4(2x-y=9) => 8x - 4y = 36 \n" ); document.write( "3x + 4y = -14 \n" ); document.write( "8x + 3x - 4y + 4y = 36 + -14 \n" ); document.write( "11x = 22 \n" ); document.write( "x = 2 \n" ); document.write( "... \n" ); document.write( "Multiply the first equation by 3 and the second equation by -2, add the equations and solve for y \n" ); document.write( "3(2x-y=9) ==> 6x - 3y = 27 \n" ); document.write( "-2(3x+4y=-14) ==> -6x - 8y = 28 \n" ); document.write( "6x + -6x + -3y + -8y = 27 + 28 \n" ); document.write( "-11y = 55 \n" ); document.write( "y = -5 \n" ); document.write( "... \n" ); document.write( "Solution (2, -5) \n" ); document.write( "………………. \n" ); document.write( "Have more questions? Get them all answered at once. \n" ); document.write( "HomeworkHelpers@readingboosters.com \n" ); document.write( "Understand your homework, prepare for upcoming tests, improve your scores. \n" ); document.write( "www.MyHomeworkAnswers.com \r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |