document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=955723>Question 955723</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 1.bill is 3 times as old as his kid brother jack.four years ago,he was 4years less than 5times jack's age at that time.How old are they?\r<BR>\n" );
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document.write( "2.the length of a rectangle is three times its width.if the length is decreassed by 20ft and the width increassed by 10ft the are is increassed by 200 find the dimension of the rectangle.\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 #583956 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=583956\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 1.<BR>\n" );
document.write( "let b = Bill's age<BR>\n" );
document.write( "let j = Jack's age<BR>\n" );
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document.write( "write an equation for each statement<BR>\n" );
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document.write( "bill is 3 times as old as his kid brother jack.<BR>\n" );
document.write( "b = 3j<BR>\n" );
document.write( "four years ago, he was 4 years less than 5 times jack's age at that time.<BR>\n" );
document.write( "b - 4 = 5(j-4) - 4<BR>\n" );
document.write( "b - 4 = 5j - 20 - 4<BR>\n" );
document.write( "b = 5j - 20 - 4 + 4<BR>\n" );
document.write( "b = 5j - 20<BR>\n" );
document.write( "replace b with 3j, from the 1st statement<BR>\n" );
document.write( "3j = 5j - 20<BR>\n" );
document.write( "20 = 5j - 3j<BR>\n" );
document.write( "20 = 2j<BR>\n" );
document.write( "j = 10 yrs is Jack's age<BR>\n" );
document.write( "then<BR>\n" );
document.write( "3(10) = 30 yrs is Bill's age<BR>\n" );
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document.write( "2.the length of a rectangle is three times its width.<BR>\n" );
document.write( "L = 3W<BR>\n" );
document.write( "A = L*W<BR>\n" );
document.write( "if the length is decreased by 20ft and the width increased by 10ft the area is increased by 200.<BR>\n" );
document.write( "(L-20) * (W+10) = LW + 200<BR>\n" );
document.write( "FOIL<BR>\n" );
document.write( "LW + 10L - 20W - 200 = LW + 200<BR>\n" );
document.write( "LW - LW + 10L - 20W = 200 + 200<BR>\n" );
document.write( "10L - 20W = 400<BR>\n" );
document.write( "simplify, divide by 10<BR>\n" );
document.write( "L - 2W = 40<BR>\n" );
document.write( "Replace L with 3W, from the 1st statement<BR>\n" );
document.write( "3W - 2W = 40<BR>\n" );
document.write( "W = 40 ft is the original width<BR>\n" );
document.write( "then<BR>\n" );
document.write( "3(40) = 120 ft is original length\r<BR>\n" );
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document.write( ":\r<BR>\n" );
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