document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=93720>Question 93720</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Riza was 25 when her 1st son was born.Today, the sum of their ages is 105.How old is Riza and her son now? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #68285 by </B><A HREF=/tutors/aboutme.mpl?userid=bucky><B>bucky(2189)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=bucky><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=68285\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> When her son was born Riza was 25 and at that time her son was 0 years old.<BR>\n" );
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document.write( "Since that time, x years have gone by. Riza is now 25 + x years old and her son is now x years old.<BR>\n" );
document.write( "If you add their two ages, the result is 105. In equation form this is:<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=25+%2B+x+%2B+x+=+105 ALIGN=MIDDLE  ALT=\"25+%2B+x+%2B+x+=+105\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "Combining the two x terms on the left side results in:<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=25+%2B+2x+=+105 ALIGN=MIDDLE  ALT=\"25+%2B+2x+=+105\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "Then get rid of the 25 on the left side by subtracting 25 from both sides. The equation<BR>\n" );
document.write( "then becomes:<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2x+=+80 ALIGN=MIDDLE  ALT=\"2x+=+80\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "Solve for x by dividing both sides by 2 to get:<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+80%2F2+=+40 ALIGN=MIDDLE  ALT=\"x+=+80%2F2+=+40\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "That means that Riza's son whose age is x is 40 years old. And since the sum of their ages<BR>\n" );
document.write( "is 105, then Riza must be 105 - 40 or 65 years old.  <BR>\n" );
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document.write( "And since Riza is now 65 years old, then 40 years ago she was 25 years old, and since her son<BR>\n" );
document.write( "is now 40 years old, 40 years ago he was 0 and therefore was a new born.  <BR>\n" );
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document.write( "Everything seems to work out, so the answer of Riza presently being 65 and her son presently<BR>\n" );
document.write( "being 40 years old is correct.<BR>\n" );
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document.write( "Hope this helps you to see how you can just think your way through problems such as these.<BR>\n" );
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