document.write( "Question 194236: a mason can build a wall in 6 hours less than an apprentice. working together they can build a wall in 4 hours. how long would it take the apprentice working alone?\r
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document.write( "so far i have 1/x + 1/x-6 = 1/4. i think my next step is the find the lcm/lcd but that is where i am having problems. \n" );
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Algebra.Com's Answer #145798 by scott8148(6628)![]() ![]() You can put this solution on YOUR website! good so far \n" ); document.write( "you don't need a lcm/lcd \n" ); document.write( "just multiplying by the individual denominators will clear the fractions\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "multiplying by 4(x)(x-6) ___ 4(x-6) + 4x = x(x-6)\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "4x - 24 + 4x = x^2 - 6x\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "subtracting 8x-24 ___ 0 = x^2 - 14x + 24\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "factoring ___ 0 = (x-2)(x-12)\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "x = 2 and x = 12 ___ from the statement of the problem, 2 is not realistic \n" ); document.write( " |