document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=661033>Question 661033</A>: <I><SPAN STYLE=\"word-break: break-all;\"> David is 3 years older than his brother. They have a combined age of 23. how old is David.<BR>\n" );
document.write( "a. 7<BR>\n" );
document.write( "b. 10<BR>\n" );
document.write( "c. 13<BR>\n" );
document.write( "d. 16 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #411450 by </B><A HREF=/tutors/aboutme.mpl?userid=colliefan><B>colliefan(242)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=colliefan><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=411450\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Write as an algebraic equation.\r<BR>\n" );
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document.write( "brother's age = x<BR>\n" );
document.write( "David's age = x+3\r<BR>\n" );
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document.write( "The sum is 23 so:\r<BR>\n" );
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document.write( "x+(x+3)=23<BR>\n" );
document.write( "2x+3=23<BR>\n" );
document.write( "2x+3-3=23-3<BR>\n" );
document.write( "2x+0=20<BR>\n" );
document.write( "2x=20<BR>\n" );
document.write( "2x*1/2=20*1/2<BR>\n" );
document.write( "x*1=10<BR>\n" );
document.write( "x=10\r<BR>\n" );
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document.write( "Check to see if 10 and 13 are solutions. 10+13 is 23. </SPAN>\n" );
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