document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=924141>Question 924141</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Seven years ago, my father's age was five times mine. Right now, his age is the sum of our two ages 7 years ago. How old am I? Thanks for your help. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #560639 by </B><A HREF=/tutors/aboutme.mpl?userid=TimothyLamb><B>TimothyLamb(4379)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=TimothyLamb><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=TimothyLamb><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=560639\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> x = father age now<BR>\n" );
document.write( "y = son age now<BR>\n" );
document.write( "---<BR>\n" );
document.write( "x - 7 = 5(y - 7)<BR>\n" );
document.write( "x = (x - 7) + (y - 7)<BR>\n" );
document.write( "---<BR>\n" );
document.write( "put the system of linear equations into standard form<BR>\n" );
document.write( "---<BR>\n" );
document.write( "x - 7 = 5y - 35<BR>\n" );
document.write( "x = x - 7 + y - 7<BR>\n" );
document.write( "---<BR>\n" );
document.write( "x - 5y = - 28<BR>\n" );
document.write( "y = 14<BR>\n" );
document.write( "---<BR>\n" );
document.write( "copy and paste the above standard form linear equations in to this solver:<BR>\n" );
document.write( "https://sooeet.com/math/system-of-linear-equations-solver.php<BR>\n" );
document.write( "---<BR>\n" );
document.write( "solution:<BR>\n" );
document.write( "x = father age now = 42<BR>\n" );
document.write( "y = son age now = 14<BR>\n" );
document.write( "---<BR>\n" );
document.write( "now by substitution:<BR>\n" );
document.write( "---<BR>\n" );
document.write( "x - 5y = - 28<BR>\n" );
document.write( "y = 14<BR>\n" );
document.write( "---<BR>\n" );
document.write( "x - 5*14 = - 28<BR>\n" );
document.write( "x = 5*14 - 28<BR>\n" );
document.write( "x = 42<BR>\n" );
document.write( "---<BR>\n" );
document.write( "solution:<BR>\n" );
document.write( "x = father age now = 42<BR>\n" );
document.write( "y = son age now = 14<BR>\n" );
document.write( "---<BR>\n" );
document.write( "Solve and graph linear equations:<BR>\n" );
document.write( "https://sooeet.com/math/linear-equation-solver.php<BR>\n" );
document.write( "---<BR>\n" );
document.write( "Solve quadratic equations, quadratic formula:<BR>\n" );
document.write( "https://sooeet.com/math/quadratic-formula-solver.php<BR>\n" );
document.write( "---<BR>\n" );
document.write( "Solve systems of linear equations up to 6-equations 6-variables:<BR>\n" );
document.write( "https://sooeet.com/math/system-of-linear-equations-solver.php </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );