document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=931198>Question 931198</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Immeadiate help pls!! Answer all with solutions and <BR>\n" );
document.write( "explanations using one variable which is X only.Thanks!<BR>\n" );
document.write( "1. Dave is four times as old as Rob. Five years ago, Rob <BR>\n" );
document.write( "was 30 years younger than Dave. Find their present <BR>\n" );
document.write( "ages.<BR>\n" );
document.write( "2.Tom is 8 years older than Alex. 3 years ago, Alex was <BR>\n" );
document.write( "2 years more than one-third as Tom was then.How old is tom.<BR>\n" );
document.write( "3.John is twice as old as his wife Mary. Five years <BR>\n" );
document.write( "ago,John was 10 years younger than 3 times Mary's<BR>\n" );
document.write( "age. How old is Mary now? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #565484 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=565484\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 1. Dave is four times as old as Rob. Five years ago, Rob <BR>\n" );
document.write( "was 30 years younger than Dave. Find their present <BR>\n" );
document.write( "ages.<BR>\n" );
document.write( "D = 4R<BR>\n" );
document.write( "R = D-30<BR>\n" );
document.write( "---<BR>\n" );
document.write( "Substitute::<BR>\n" );
document.write( "R = 4R-30<BR>\n" );
document.write( "-3R = -30<BR>\n" );
document.write( "Rob = 10 yrs<BR>\n" );
document.write( "D = 4R = 40 yrs<BR>\n" );
document.write( "-----------------------<BR>\n" );
document.write( " 2.Tom is 8 years older than Alex. 3 years ago, Alex was <BR>\n" );
document.write( "2 years more than one-third as Tom was then.How old is tom.<BR>\n" );
document.write( "T = A + 8<BR>\n" );
document.write( "A-3 = (1/3)(T-3)+2<BR>\n" );
document.write( "-----<BR>\n" );
document.write( "Substitute::<BR>\n" );
document.write( "T-8-3 = (1/3)T - 1 + 2<BR>\n" );
document.write( "T-11 = (1/3)T + 1<BR>\n" );
document.write( "(2/3)T = 2<BR>\n" );
document.write( "T = 3 yrs<BR>\n" );
document.write( "----------------\r<BR>\n" );
document.write( "\n" );
document.write( " 3.John is twice as old as his wife Mary. Five years <BR>\n" );
document.write( "ago,John was 10 years younger than 3 times Mary's<BR>\n" );
document.write( " age. How old is Mary now?<BR>\n" );
document.write( "J = 2M<BR>\n" );
document.write( "J-5 = 3(M-5)-10<BR>\n" );
document.write( "2M-5 = 3M-25<BR>\n" );
document.write( "M = 20 yrs<BR>\n" );
document.write( "--------------<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "------------ </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );