document.write( "Question 937813: ed is twice as old as dave
\n" );
document.write( "fran is 13 years younger than ed
\n" );
document.write( "Fran is 5 years older than dave\r
\n" );
document.write( "\n" );
document.write( "Question : form an equation in x (taking Dave's age to be x) and solve the equation to find Dave's age \n" );
document.write( "
Algebra.Com's Answer #571238 by ankor@dixie-net.com(22740)![]() ![]() You can put this solution on YOUR website! ed is twice as old as dave \n" ); document.write( "fran is 13 years younger than ed \n" ); document.write( "Fran is 5 years older than dave \n" ); document.write( "Question : form an equation in x (taking Dave's age to be x) and solve the equation to find Dave's age \n" ); document.write( ": \n" ); document.write( "ed is twice as old as dave \n" ); document.write( "e = 2x \n" ); document.write( ": \n" ); document.write( "fran is 13 years younger than ed \n" ); document.write( "f = e - 13 \n" ); document.write( "replace e with 2x (from the 1st statement) \n" ); document.write( "f = 2x - 13 \n" ); document.write( ": \n" ); document.write( "Fran is 5 years older than dave \n" ); document.write( "f = x + 5 \n" ); document.write( ": \n" ); document.write( "f = f, so write the equation as \n" ); document.write( "2x - 13 = x + 5 \n" ); document.write( "2x - x = 5 + 13 \n" ); document.write( "x = 18 is Dave's age \n" ); document.write( ": \n" ); document.write( ": \n" ); document.write( "Confirm this with the two Fran equations \n" ); document.write( "f = 2(18) - 13 \n" ); document.write( "f = 23 \n" ); document.write( "and \n" ); document.write( "f = 18 + 5 \n" ); document.write( "f = 23 \n" ); document.write( " |