document.write( "Question 513518: the sum of three numbers is 45. one number is five more than the second number. it is also twice the third. find the numbers. \n" ); document.write( "
Algebra.Com's Answer #343026 by MathTherapy(10552)![]() ![]() You can put this solution on YOUR website! \r \n" ); document.write( "\n" ); document.write( "Let 1st number be F \n" ); document.write( "Then second = F – 5 \n" ); document.write( "Also, third = ½F\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "We then have: F + F – 5 + ½F = 45 \n" ); document.write( "2½F – 5 = 45 \n" ); document.write( "2½F = 45 + 5 \n" ); document.write( "2½F = 50 \n" ); document.write( "5F/2 = 50 \n" ); document.write( "5F = 100 ----- Cross-multiplying \n" ); document.write( "F, or 1st number = 100/5, or \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "2nd number = F – 5, or 20 – 5, or \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "3rd number = ½F, or ½(20), or \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "------- \n" ); document.write( "Check \n" ); document.write( "------- \n" ); document.write( "First + second + third = 45\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "20 + 15 + 10 = 45 \r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "45 = 45 (TRUE)\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Send comments and “thank-yous” to “D” at MathMadEzy@aol.com \n" ); document.write( " |