document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=759058>Question 759058</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Ann's age is seven-tenths of Bill's age. In 4 years ann's age will be eigth-elevenths of Bill's age. How old is Bill now? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #461813 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=461813\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Ann's age is seven-tenths of Bill's age. In 4 years ann's age will be eigth-elevenths of Bill's age. How old is Bill now?<BR>\n" );
document.write( "----<BR>\n" );
document.write( "Equations:<BR>\n" );
document.write( "a = (7/10)b<BR>\n" );
document.write( "a+4 = (8/11)(b+4)<BR>\n" );
document.write( "------<BR>\n" );
document.write( "Modify:<BR>\n" );
document.write( "10a = 7b<BR>\n" );
document.write( "11a + 44 = 8b+32<BR>\n" );
document.write( "------<BR>\n" );
document.write( "Rearrange:<BR>\n" );
document.write( "10a - 7b = 0<BR>\n" );
document.write( "11a - 8b = -12<BR>\n" );
document.write( "--------------------<BR>\n" );
document.write( "Modify for elimination:<BR>\n" );
document.write( "80a - 56b = 0<BR>\n" );
document.write( "77a - 56b = -84<BR>\n" );
document.write( "-----<BR>\n" );
document.write( "Subtract and solve for \"a\":<BR>\n" );
document.write( "3a = 84<BR>\n" );
document.write( "a = 28<BR>\n" );
document.write( "-------<BR>\n" );
document.write( "Solve for \"b\":<BR>\n" );
document.write( "7b = 10a<BR>\n" );
document.write( "b = 10(28)/7<BR>\n" );
document.write( "b = 40<BR>\n" );
document.write( "==================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "=====================<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );