document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1202878>Question 1202878</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 10 years ago, when Su Lin celebrated her birthday with her family, the ratio of the age of Su Lin to Su Lin's sister was 5 : 7. This year, the ratio of the age of Su Lin to Su Lin's sister is 5 : 6. How old is Su Lin now?\r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #838070 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=838070\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 10 years ago, when Su Lin celebrated her birthday with her family, the ratio of the age of Su Lin to Su Lin's sister was 5 : 7. This year, the ratio of the age of Su Lin to Su Lin's sister is 5 : 6. How old is Su Lin now?\r<BR>\n" );
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document.write( " let the common multiple be x\r<BR>\n" );
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document.write( "10years ago Su lin was 5x years\r<BR>\n" );
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document.write( "Her sister was 7x years\r<BR>\n" );
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document.write( "after 10 years \r<BR>\n" );
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document.write( "Su lin is  5x +10 years\r<BR>\n" );
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document.write( "Her sister is 7x +10 years\r<BR>\n" );
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document.write( "(5x+10)/(7x+10) = 5/6    ( given condition)\r<BR>\n" );
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document.write( "6(5x+10)= 5(7x+10)\r<BR>\n" );
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document.write( "30x +60 = 35x + 50\r<BR>\n" );
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document.write( "35x-30x=60-50\r<BR>\n" );
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document.write( "5x=10<BR>\n" );
document.write( "x= 2 \r<BR>\n" );
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document.write( "Su lin was 2*5 =10  years old 10years ago\r<BR>\n" );
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document.write( "Now she is 10+10 = 20 years\r<BR>\n" );
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