document.write( "Question 463386: solve the following equation for x\r
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document.write( "3/x-3+7/x+3=5x/x^2-9\r
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document.write( "these are 3 fractions, I get close, but somehow get messed up \n" );
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Algebra.Com's Answer #317512 by algebrahouse.com(1659)![]() ![]() You can put this solution on YOUR website! 3/(x - 3) + 7/(x + 3) = 5x/(x² - 9) \n" ); document.write( "3/(x - 3) + 7/(x + 3) = 5x/(x + 3)(x - 3) {factored x² - 9 into (x + 3)(x - 3)}\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Multiply entire equation by least common denominator (x + 3)(x - 3) \n" ); document.write( "(x + 3)(x - 3)[3/(x - 3) + 7/(x + 3) = 5x/(x + 3)(x - 3)]\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Multiply each term by (x + 3)(x - 3) \n" ); document.write( "(x + 3)(x - 3)[3/(x - 3)] + (x + 3)(x - 3)[7/(x + 3)] = (x + 3)(x - 3)5x/(x + 3)(x - 3)]\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "3(x + 3) + 7(x - 3) = 5x {cancelled and multiplied what's left} \n" ); document.write( "3x + 9 + 7x - 21 = 5x {used distributive property} \n" ); document.write( "10x - 12 = 5x {combined like terms} \n" ); document.write( "-12 = -5x {subtracted 10x from both sides} \n" ); document.write( "x = 12/5 {divided both sides by -5} \n" ); document.write( " For more help from me, visit: www.algebrahouse.com \n" ); document.write( " |