document.write( "Question 794514: Mrs. Lemecha's dad is 5 times as old as he was 40 years ago? how old is Mrs. Lemecha's dad? \n" ); document.write( "
Algebra.Com's Answer #852524 by ikleyn(53427)\"\" \"About 
You can put this solution on YOUR website!
.
\n" ); document.write( "Mrs. Lemecha's dad is 5 times as old as he was 40 years ago? how old is Mrs. Lemecha's dad?
\n" ); document.write( "~~~~~~~~~~~~~~~~~~~~~~~~~~~\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "        This is a nice problem, but the solution given in the post by @lynnlo is absolutely incorrect.\r
\n" ); document.write( "\n" ); document.write( "        I came to bring a correct solution.\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "
\r\n" );
document.write( "Let x be the age of the dad.\r\n" );
document.write( "\r\n" );
document.write( "40 years ago his age was (x-40) years.\r\n" );
document.write( "\r\n" );
document.write( "Write equation as you read the problem\r\n" );
document.write( "\r\n" );
document.write( "    x = 5(x-40)\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Simplify it step by step and find x\r\n" );
document.write( "\r\n" );
document.write( "    x = 5x - 5*40,\r\n" );
document.write( "\r\n" );
document.write( "    x = 5x - 200\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Collect the terms with 'x' on the right side;  \r\n" );
document.write( "move the constant term -200 to the left side changing its sign\r\n" );
document.write( "\r\n" );
document.write( "    200 = 5x - x\r\n" );
document.write( "\r\n" );
document.write( "    200 = 4x\r\n" );
document.write( "\r\n" );
document.write( "     x = 200/4 = 50.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "ANSWER.  The dad is 50 years old.\r\n" );
document.write( "
\r
\n" ); document.write( "\n" ); document.write( "Solved.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "This problem teaches to read problem attentively and to make setup accurately and adequately.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Therefore, this problem has great educational/instructional value and teaches to treat Math problems with respect.\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "
\n" );