document.write( "Question 163362: Please help me solve for x: x/6 +x/12 +x/7 +5 +x/2 +4 =x \r
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document.write( "I have tried multiplying the fractions by 48 (the LCD) but I got stuck and the answer I got didn't make sense. Please help me. \n" );
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Algebra.Com's Answer #120371 by gonzo(654)![]() ![]() ![]() You can put this solution on YOUR website! LCD is not 48. \n" ); document.write( "it's 84 as far as i can tell. \n" ); document.write( "that would be 7 * 12. \n" ); document.write( "your equation is: \n" ); document.write( "x/6 +x/12 +x/7 +5 +x/2 +4 = x \n" ); document.write( "multiplying both sides of your equation by 84 gets \n" ); document.write( "(84*x/6) + (84*x/12) + (84*x/7) + (84*5) + (84*x/2) + (4*84) = (84*x) \n" ); document.write( "----- \n" ); document.write( "removing the denominators gets \n" ); document.write( "14*x + 7*x + 12*x + (84*5) + 42*x + (4*84) = (84*x) \n" ); document.write( "----- \n" ); document.write( "multiplying out all factors that can be multiplied out gets \n" ); document.write( "14*x + 7*x + 12*x + 420 + 42*x + 336 = 84*x \n" ); document.write( "----- \n" ); document.write( "combining like terms gets \n" ); document.write( "75*x + 756 = 84*x \n" ); document.write( "subtracting 75*x from both sides of the equation gets \n" ); document.write( "756 = 84*x - 75*x \n" ); document.write( "which becomes \n" ); document.write( "756 = 9*x \n" ); document.write( "which becomes \n" ); document.write( "84 = x \n" ); document.write( "which is the same as \n" ); document.write( "x = 84 \n" ); document.write( "----- \n" ); document.write( " |