document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=556802>Question 556802</A>: <I><SPAN STYLE=\"word-break: break-all;\"> in a family mother's age is twice that of daughters age father is 10 years older than mother. brother is 20 years younger than mother and 5 years older than his sister. what is fathers age. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #362350 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=362350\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let f = father's age<BR>\n" );
document.write( "Let m = mother's age<BR>\n" );
document.write( "Let d = daughter's (sister) age <BR>\n" );
document.write( "Let s = son's (brother) age<BR>\n" );
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document.write( "Write an equation for each statement<BR>\n" );
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document.write( "\"mother's age is twice that of daughters age\"<BR>\n" );
document.write( "m = 2d<BR>\n" );
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document.write( "\"father is 10 years older than mother.\"<BR>\n" );
document.write( "f = m + 10<BR>\n" );
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document.write( "rearrange the next two equations for elimination.<BR>\n" );
document.write( "\"brother is 20 years younger than mother\"<BR>\n" );
document.write( "s = m - 20<BR>\n" );
document.write( "replace m with 2d and you have<BR>\n" );
document.write( "s = 2d - 20<BR>\n" );
document.write( "s - 2d = -20<BR>\n" );
document.write( "multiply by -1<BR>\n" );
document.write( "-s + 2d = 20<BR>\n" );
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document.write( "\"and 5 years older than his sister. \"<BR>\n" );
document.write( "s = d + 5<BR>\n" );
document.write( "s - d = 5<BR>\n" );
document.write( ";<BR>\n" );
document.write( "Use these two equation for elimination<BR>\n" );
document.write( "-s + 2d = 20<BR>\n" );
document.write( " s - d  =  5<BR>\n" );
document.write( "--------------addition eliminates s, find d<BR>\n" );
document.write( "d = 25 is daughter's age<BR>\n" );
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document.write( "we know m = 2d<BR>\n" );
document.write( "m = 2(25)<BR>\n" );
document.write( "m = 50 yrs is Mom's age<BR>\n" );
document.write( "then<BR>\n" );
document.write( "f = m + 10<BR>\n" );
document.write( "f = 50 + 10<BR>\n" );
document.write( "f = 60 yrs is father's age, which is what they want\r<BR>\n" );
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document.write( " </SPAN>\n" );
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