document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=272223>Question 272223</A>: <I><SPAN STYLE=\"word-break: break-all;\"> andy and brian together have $40, brian and chris have $62  and andy and chris have $58. how much money do the three of them have together ?\r<BR>\n" );
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document.write( "a $160    b  $80    c  $40    d $100    e  $120<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 #199197 by </B><A HREF=/tutors/aboutme.mpl?userid=Theo><B>Theo(13342)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Theo><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=Theo><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=199197\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> a = money that andy has.<BR>\n" );
document.write( "b = money that brian has.<BR>\n" );
document.write( "c = money that chris has.\r<BR>\n" );
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document.write( "a + b = 40<BR>\n" );
document.write( "b + c = 62<BR>\n" );
document.write( "a + c = 58\r<BR>\n" );
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document.write( "use your first equation to solve for b in terms of a.<BR>\n" );
document.write( "you get b = 40-a\r<BR>\n" );
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document.write( "use your third equation to solve for c in terms of a.<BR>\n" );
document.write( "you get c = 58-a\r<BR>\n" );
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document.write( "substitute for b and c in your second equation to get:\r<BR>\n" );
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document.write( "b + c = 62 becomes:<BR>\n" );
document.write( "40-a + 58-a = 62<BR>\n" );
document.write( "combine like terms to get:<BR>\n" );
document.write( "98 - 2a = 62<BR>\n" );
document.write( "add 2a to both sides of this equation and subtract 62 from both sides of this equation to get:<BR>\n" );
document.write( "98 - 62 = 2a<BR>\n" );
document.write( "combine like terms to get:<BR>\n" );
document.write( "36 = 2a<BR>\n" );
document.write( "divide both sides of this equation by 2 to get:<BR>\n" );
document.write( "18 = a\r<BR>\n" );
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document.write( "substitute for a in the first equation to get:\r<BR>\n" );
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document.write( "a + b = 40 becomes:<BR>\n" );
document.write( "18 + b = 40<BR>\n" );
document.write( "solve for b to get:<BR>\n" );
document.write( "b = 40-18 = 22\r<BR>\n" );
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document.write( "substitute for a in the third equation to get:\r<BR>\n" );
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document.write( "a + c = 58 becomes:<BR>\n" );
document.write( "18 + c = 58<BR>\n" );
document.write( "solve for c to get:<BR>\n" );
document.write( "c = 58-18 = 40\r<BR>\n" );
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document.write( "your solution should be:<BR>\n" );
document.write( "a = 18<BR>\n" );
document.write( "b = 22<BR>\n" );
document.write( "c = 40\r<BR>\n" );
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document.write( "substitute in your original equations to see if these values are good.\r<BR>\n" );
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document.write( "original equations are:\r<BR>\n" );
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document.write( "a + b = 40<BR>\n" );
document.write( "b + c = 62<BR>\n" );
document.write( "a + c = 58\r<BR>\n" );
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document.write( "These become:\r<BR>\n" );
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document.write( "18 + 22 = 40 (true)<BR>\n" );
document.write( "22 + 40 = 62 (true)<BR>\n" );
document.write( "18 + 40 = 58 (true)\r<BR>\n" );
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document.write( "Values are good.\r<BR>\n" );
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document.write( "Answer is:\r<BR>\n" );
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document.write( "The money that all 3 of them have together is:\r<BR>\n" );
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document.write( "18 + 22 + 40 = $80.00\r<BR>\n" );
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document.write( "That would be selection b.\r<BR>\n" );
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