document.write( "Question 114531: If fifteen less than two times a number is divided by six more than the number, the result is four less than 9 times the reciprocal of that number. Find the number \n" ); document.write( "
Algebra.Com's Answer #83397 by ankor@dixie-net.com(22740)![]() ![]() You can put this solution on YOUR website! Let x = \"a number\" \n" ); document.write( ": \n" ); document.write( "Break it down, write an expression for each phrase \n" ); document.write( ": \n" ); document.write( "If fifteen less than two times a number \n" ); document.write( "2x - 15 \n" ); document.write( ": \n" ); document.write( "\"is divided by six more than the number,\" \n" ); document.write( " \n" ); document.write( ": \n" ); document.write( "The word \"is\" usually mean \"=\" in these type problems \n" ); document.write( "\"result is four less than 9 times the reciprocal of that number. \n" ); document.write( " \n" ); document.write( "Or \n" ); document.write( " \n" ); document.write( ": \n" ); document.write( " Find the number \n" ); document.write( "Multiply equation by x(x+6) to get rid of the denominators \n" ); document.write( "x(x+6)* \n" ); document.write( ": \n" ); document.write( "Cancel the denominators and you have: \n" ); document.write( "x(2x-15) = 9(x+6) - 4(x^2 + 6x) \n" ); document.write( ": \n" ); document.write( "2x^2 - 15x = 9x + 54 - 4x^2 - 24x \n" ); document.write( ": \n" ); document.write( "Arrange as a quadratic on the left: \n" ); document.write( "2x^2 + 4x^2 - 15x - 9x + 24x - 54 = 0 \n" ); document.write( ": \n" ); document.write( "6x^2 - 54 = 0 \n" ); document.write( ": \n" ); document.write( "6x^2 = +54 \n" ); document.write( ": \n" ); document.write( "x^2 = \n" ); document.write( "x^2 = 9 \n" ); document.write( "x = 3 is the number \n" ); document.write( ": \n" ); document.write( ": \n" ); document.write( "Check solution in our initial equation \n" ); document.write( " \n" ); document.write( ": \n" ); document.write( " \n" ); document.write( ": \n" ); document.write( " \n" ); document.write( ": \n" ); document.write( ": \n" ); document.write( "How about this, did I make it understandable to you? \n" ); document.write( " |