document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=930314>Question 930314</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In a family, a couple has a son and a daughter. The age of the father is four times that of his daughter, and the age of the son is half of that of his mother. The wife is 8 years younger than her husband, and the brother is seven years older than his sister. What is the age of the mother? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #564940 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=564940\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> x = age of dad<BR>\n" );
document.write( "y = age of mom<BR>\n" );
document.write( "z = age of son<BR>\n" );
document.write( "u = age of daughter<BR>\n" );
document.write( "---<BR>\n" );
document.write( "x = 4u<BR>\n" );
document.write( "y = 2z<BR>\n" );
document.write( "y = x - 8<BR>\n" );
document.write( "z = u + 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 - 4u = 0<BR>\n" );
document.write( "y - 2z = 0<BR>\n" );
document.write( "x - y = 8<BR>\n" );
document.write( "z - u = 7<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 = age of dad = 44<BR>\n" );
document.write( "y = age of mom = 36<BR>\n" );
document.write( "z = age of son = 18<BR>\n" );
document.write( "u = age of daughter = 11<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<BR>\n" );
document.write( "--- </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );