document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1201541>Question 1201541</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The average age of two sisters is three times the age of the younger one . in seven years' time the sum of their ages will be greater than the difference in their ages by 20 years. how old are they now? (The answer is 3 and 15)<BR>\n" );
document.write( " so , <BR>\n" );
document.write( "Let x=older sister   and y=younger sister <BR>\n" );
document.write( "x+y=3y<BR>\n" );
document.write( "7+(x+y) greater than (x-y)+20 \r<BR>\n" );
document.write( "\n" );
document.write( "But how can you form Simultaneous equations from this ? How is it worked out ? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #835959 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39618)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=835959\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> ---------------------------------------------<BR>\n" );
document.write( "The average age of two sisters is three times the age of the younger one . <BR>\n" );
document.write( "in seven years' time the sum of their ages will be greater than the difference in their ages by 20 years. <BR>\n" );
document.write( "how old are they now? (The answer is 3 and 15)<BR>\n" );
document.write( " <BR>\n" );
document.write( "so , <BR>\n" );
document.write( "Let x=older sister   and y=younger sister <BR>\n" );
document.write( "x+y=3y<BR>\n" );
document.write( "7+(x+y) greater than (x-y)+20 \r<BR>\n" );
document.write( "\n" );
document.write( "But how can you form Simultaneous equations from this ? How is it worked out ?<BR>\n" );
document.write( "-------------------------------------------\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "j, younger<BR>\n" );
document.write( "v, older\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "To follow the description exactly as written,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=system%28%28j%2Bv%29%2F2=3j%2C%28j%2B7%29%2B%28v%2B7%29-%28v-j%29=20%29 ALIGN=MIDDLE  ALT=\"system%28%28j%2Bv%29%2F2=3j%2C%28j%2B7%29%2B%28v%2B7%29-%28v-j%29=20%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Simplifying from that system,\r<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=system%28j%2Bv=6j%2Cj%2Bv%2B14-v%2Bj=20%29 ALIGN=MIDDLE  ALT=\"system%28j%2Bv=6j%2Cj%2Bv%2B14-v%2Bj=20%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=system%28j%2Bv=6j%2C2j=6%29 ALIGN=MIDDLE  ALT=\"system%28j%2Bv=6j%2C2j=6%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=system%28v=5j%2Cj=3%29 ALIGN=MIDDLE  ALT=\"system%28v=5j%2Cj=3%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );