document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=536222>Question 536222</A>: <I><SPAN STYLE=\"word-break: break-all;\"> marks dad is 3 times as old as mark . The sum of their ages is 48 , how old is mark? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #352202 by </B><A HREF=/tutors/aboutme.mpl?userid=algebrahouse.com><B>algebrahouse.com(1659)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=algebrahouse.com><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=algebrahouse.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=352202\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> \"marks dad is 3 times as old as mark . The sum of their ages is 48 , how old is mark?\"\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "x = Mark's age<BR>\n" );
document.write( "3x = Mark's dad's age {Mark's dad is 3 times Mark}\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "x + 3x = 48 {sum of ages is 48}<BR>\n" );
document.write( "4x = 48 {combined like terms}<BR>\n" );
document.write( "x  = 12 {divided both sides by 4}\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Mark is 12<BR>\n" );
document.write( "<br>For more help from me, visit: <a  rel=nofollow HREF= \"http://www.algebrahouse.com/\" target = \"_blank\">www.algebrahouse.com</a><br><br><br> </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );