document.write( "Question 1129766: Sam is three times as old as Steve. In 8 years, he will be twice as old. \n" ); document.write( "
Algebra.Com's Answer #746365 by Edwin McCravy(20056)![]() ![]() You can put this solution on YOUR website! \r\n" ); document.write( "Obviously you wanted to know the age of each. Ikleyn knew that was what\r\n" ); document.write( "you wanted. She just wanted to impress upon you to be careful to\r\n" ); document.write( "state the whole problem, not just part of it.\r\n" ); document.write( "\r\n" ); document.write( "Let X = Sam's age\r\n" ); document.write( "Let Y = Steve's age.\r\n" ); document.write( " \n" ); document.write( "Sam is three times as old as Steve. \n" ); document.write( " \r\n" ); document.write( "X = 3Y\r\n" ); document.write( " \n" ); document.write( "In 8 years, he (Sam) will be twice as old (as Steve). \n" ); document.write( " \r\n" ); document.write( "Sam's age in 8 years = X+8\r\n" ); document.write( "Steve's age in 8 years = Y+8\r\n" ); document.write( "\r\n" ); document.write( "X+8 = 3(Y+8)\r\n" ); document.write( "\r\n" ); document.write( "The system of equations is\r\n" ); document.write( "\r\n" ); document.write( "X = 3Y\r\n" ); document.write( "X+8 = 2(Y+8)\r\n" ); document.write( "\r\n" ); document.write( "Substitute 3Y for X in: X+8 = 2(Y+8)\r\n" ); document.write( "\r\n" ); document.write( "3Y+8 = 2(Y+8)\r\n" ); document.write( "\r\n" ); document.write( "Solve for Y. That will be Steve's age.\r\n" ); document.write( "Then multiply that by 3 to get Sam's age.\r\n" ); document.write( "\r\n" ); document.write( "Edwin\n" ); document.write( " |