document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=694902>Question 694902</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help me solve word problem: \r<BR>\n" );
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document.write( "Given that a father's age is 1 less than twice that of his son, and that the digits AB making up the father's age are reversed in the son's age (i.e. BA).<BR>\n" );
document.write( "How old are the father and son? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #428278 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=428278\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Given that a father's age is 1 less than twice that of his son,<BR>\n" );
document.write( " and that the digits AB making up the father's age are reversed in the son's age <BR>\n" );
document.write( "(i.e. BA).<BR>\n" );
document.write( "How old are the father and son?<BR>\n" );
document.write( ":<BR>\n" );
document.write( "Let a = the 10's digit of father's age<BR>\n" );
document.write( "Let b = the ones<BR>\n" );
document.write( "then<BR>\n" );
document.write( "(10a+b) = his age<BR>\n" );
document.write( "and<BR>\n" );
document.write( "(10b+a) = son's age (digits reversed<BR>\n" );
document.write( ":<BR>\n" );
document.write( "\"Given that a father's age is 1 less than twice that of his son,\"<BR>\n" );
document.write( "10a + b = 2(10b+a) - 1<BR>\n" );
document.write( "10a + b = 20b + 2a - 1<BR>\n" );
document.write( "combine like terms<BR>\n" );
document.write( "10a - 2a = 20b - b - 1<BR>\n" );
document.write( "8a = 19b - 1<BR>\n" );
document.write( "divide by 8<BR>\n" );
document.write( "a = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=19%2F8 ALIGN=MIDDLE  ALT=\"19%2F8\"   DISABLED_style= \"max-width:90%; height:auto;\" >b - <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2F8 ALIGN=MIDDLE  ALT=\"1%2F8\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Find a single digit value for b that will give an integer value for a<BR>\n" );
document.write( "After a couple of attempts came up with: <BR>\n" );
document.write( "b = 3<BR>\n" );
document.write( "a = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=19%2F8 ALIGN=MIDDLE  ALT=\"19%2F8\"   DISABLED_style= \"max-width:90%; height:auto;\" >(3) - <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2F8 ALIGN=MIDDLE  ALT=\"1%2F8\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "a = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=57%2F8 ALIGN=MIDDLE  ALT=\"57%2F8\"   DISABLED_style= \"max-width:90%; height:auto;\" > - <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2F8 ALIGN=MIDDLE  ALT=\"1%2F8\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "a = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=56%2F8 ALIGN=MIDDLE  ALT=\"56%2F8\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "a = 7<BR>\n" );
document.write( "then<BR>\n" );
document.write( "Dad's age = 73<BR>\n" );
document.write( "Son's age = 37<BR>\n" );
document.write( ":<BR>\n" );
document.write( "Check that: 2(37) - 1 = 73<BR>\n" );
document.write( " </SPAN>\n" );
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