document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1209753>Question 1209753</A>: <I><SPAN STYLE=\"word-break: break-all;\"> my  brother is 7 years younger than me.  Twice my age plus 3 times his age is 99.What are our ages? <BR>\n" );
document.write( "Plz use the singapore model method. I have the answer but can not understand how to show the working out using the bar model.\r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #850119 by </B><A HREF=/tutors/aboutme.mpl?userid=CPhill><B>CPhill(1959)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=CPhill><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=CPhill><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=850119\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let's break this problem down step-by-step:\r<BR>\n" );
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document.write( "1.  **Define Variables:**<BR>\n" );
document.write( "    * Let \"x\" represent your age.<BR>\n" );
document.write( "    * Let \"y\" represent your brother's age.\r<BR>\n" );
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document.write( "2.  **Translate the First Sentence into an Equation:**<BR>\n" );
document.write( "    * \"My brother is 7 years younger than me.\"<BR>\n" );
document.write( "    * This translates to: y = x - 7\r<BR>\n" );
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document.write( "3.  **Translate the Second Sentence into an Equation:**<BR>\n" );
document.write( "    * \"Twice my age plus 3 times his age is 99.\"<BR>\n" );
document.write( "    * This translates to: 2x + 3y = 99\r<BR>\n" );
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document.write( "4.  **Solve the System of Equations:**<BR>\n" );
document.write( "    * We have two equations:<BR>\n" );
document.write( "        * y = x - 7<BR>\n" );
document.write( "        * 2x + 3y = 99<BR>\n" );
document.write( "    * Substitute the first equation (y = x - 7) into the second equation:<BR>\n" );
document.write( "        * 2x + 3(x - 7) = 99<BR>\n" );
document.write( "    * Simplify and solve for x:<BR>\n" );
document.write( "        * 2x + 3x - 21 = 99<BR>\n" );
document.write( "        * 5x - 21 = 99<BR>\n" );
document.write( "        * 5x = 120<BR>\n" );
document.write( "        * x = 24\r<BR>\n" );
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document.write( "5.  **Solve for y:**<BR>\n" );
document.write( "    * Now that you know x = 24, substitute it back into the equation y = x - 7:<BR>\n" );
document.write( "        * y = 24 - 7<BR>\n" );
document.write( "        * y = 17\r<BR>\n" );
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document.write( "**Answer:**\r<BR>\n" );
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document.write( "* Your age is 24 years old.<BR>\n" );
document.write( "* Your brother's age is 17 years old.<BR>\n" );
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