document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=115449>Question 115449</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Ricardo is 4 years less than twice as old as his sister. The sum of their ages is 20. How old is Ricardo? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #84019 by </B><A HREF=/tutors/aboutme.mpl?userid=ganesh><B>ganesh(20)</B></A><img src=\"/images/stars/stars-06.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ganesh><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=84019\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let age of Ricardo is x and age of his sister is y.<BR>\n" );
document.write( "Ricardo is 4 years less than twice as old as his sister.<BR>\n" );
document.write( "This can be written as x = 2y - 4.<BR>\n" );
document.write( "That is, x - 2y = -4-----------(1)<BR>\n" );
document.write( "The sum of their ages is 20.<BR>\n" );
document.write( "This can be written as x + y = 20----------(2)\r<BR>\n" );
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document.write( "Solve (1) and (2).<BR>\n" );
document.write( "(1) - (2) gives -3y = -24<BR>\n" );
document.write( "That is, y = 8.\r<BR>\n" );
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document.write( "Therefore, x = 12. \r<BR>\n" );
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document.write( "Hence, Ricardo is 12 years old. <BR>\n" );
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