document.write( "Question 942056: A positive integer is 5 less than another. If the sum of the reciprocal of the smaller and twice the reciprocal of the larger is 7/30 what is the smaller integer? \n" ); document.write( "
Algebra.Com's Answer #574226 by stanbon(75887) ![]() You can put this solution on YOUR website! A positive integer is 5 less than another. If the sum of the reciprocal of the smaller and twice the reciprocal of the larger is 7/30 what is the smaller integer? \n" ); document.write( "---- \n" ); document.write( "Equations:: \n" ); document.write( "x = y-5 \n" ); document.write( "Note: x is the smaller; y is the larger \n" ); document.write( "------- \n" ); document.write( "(1/x)+(2/y) = (7/30) \n" ); document.write( "------ \n" ); document.write( "Substitute for \"y\" and solve for \"x\":: \n" ); document.write( "(1/x) + (2/(x+5)) = 7/30 \n" ); document.write( "----- \n" ); document.write( "Multiply thru by 30x(x+5) to get: \n" ); document.write( "30(x+5) + 60(x) = 7x(x+5) \n" ); document.write( "----- \n" ); document.write( "90x + 150 = 7x^2 + 35x \n" ); document.write( "----- \n" ); document.write( "7x^2 - 55x - 150 = 0 \n" ); document.write( "---- \n" ); document.write( "Ans:: x = 10 \n" ); document.write( "---------------- \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( "------------\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |