document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=241577>Question 241577</A>: <I><SPAN STYLE=\"word-break: break-all;\"> john is now 4 times as old as his brother sam. in 4 years, john will be twice as old as sam will be then. find their present ages. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #176982 by </B><A HREF=/tutors/aboutme.mpl?userid=College+Student><B>College Student(505)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=College+Student><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=College+Student><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=176982\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> John is now 4 times as old as his brother Sam, so...<BR>\n" );
document.write( "Let Sam = x<BR>\n" );
document.write( "Let John = 4x<BR>\n" );
document.write( ".<BR>\n" );
document.write( "In 4 years, John will be twice as old as Sam will be then.  Our equation now becomes: John in 4 years = twice Sam in 4 years<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4x%2B4=2%28x%2B4%29 ALIGN=MIDDLE  ALT=\"4x%2B4=2%28x%2B4%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Now solve for x to determine Sam's age.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4x%2B4=2x%2B%282%2A4%29 ALIGN=MIDDLE  ALT=\"4x%2B4=2x%2B%282%2A4%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4x%2B4=2x%2B8 ALIGN=MIDDLE  ALT=\"4x%2B4=2x%2B8\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4x-2x=8-4 ALIGN=MIDDLE  ALT=\"4x-2x=8-4\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2x=4 ALIGN=MIDDLE  ALT=\"2x=4\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=2 ALIGN=MIDDLE  ALT=\"x=2\"   DISABLED_style= \"max-width:90%; height:auto;\" > ...this is Sam's age (today)<BR>\n" );
document.write( ".<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4x=4%2A2=8 ALIGN=MIDDLE  ALT=\"4x=4%2A2=8\"   DISABLED_style= \"max-width:90%; height:auto;\" > ...this is John's age (today)<BR>\n" );
document.write( ".<BR>\n" );
document.write( "Now let's plug the x value in the original equation to see if it makes sense.<BR>\n" );
document.write( "Remember: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4x%2B4=2%28x%2B4%29 ALIGN=MIDDLE  ALT=\"4x%2B4=2%28x%2B4%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4%282%29%2B4=2%282%2B4%29 ALIGN=MIDDLE  ALT=\"4%282%29%2B4=2%282%2B4%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=8%2B4=%282%2A2%29%2B%282%2A4%29 ALIGN=MIDDLE  ALT=\"8%2B4=%282%2A2%29%2B%282%2A4%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=12=4%2B8 ALIGN=MIDDLE  ALT=\"12=4%2B8\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=12=12 ALIGN=MIDDLE  ALT=\"12=12\"   DISABLED_style= \"max-width:90%; height:auto;\" > ...the x value checks! <BR>\n" );
document.write( ".<BR>\n" );
document.write( "Done!<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );