document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=668204>Question 668204</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If Ben gives Abe four dollars, Abe will have three times as many dollars as Ben. If Abe gives Ben four dollars, they will have the same amount. How many dollars does each have?\r<BR>\n" );
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document.write( "Write a linear system of two equations.<BR>\n" );
document.write( "Solve the system by addition or substitution.<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 #415760 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=415760\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> let a = Abe's amt<BR>\n" );
document.write( "let b = Ben's amt<BR>\n" );
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document.write( " If Ben gives Abe four dollars, Abe will have three times as many dollars as Ben.<BR>\n" );
document.write( "a + 4 = 3(b-4)<BR>\n" );
document.write( "a + 4 = 3b - 12<BR>\n" );
document.write( "a = 3b  -12 - 4<BR>\n" );
document.write( "a = 3b - 16<BR>\n" );
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document.write( "If Abe gives Ben four dollars, they will have the same amount. <BR>\n" );
document.write( "a - 4 = b + 4 <BR>\n" );
document.write( "a = b + 4 + 4<BR>\n" );
document.write( "a = b + 8<BR>\n" );
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document.write( "Replace a with (b+8)  in the 1st equation<BR>\n" );
document.write( "b + 8 = 3b - 16<BR>\n" );
document.write( "8 + 16 = 3b - b<BR>\n" );
document.write( "24 = 2b<BR>\n" );
document.write( "b = $12 has Ben<BR>\n" );
document.write( "then obviously<BR>\n" );
document.write( "a = $20 </SPAN>\n" );
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