document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=83329>Question 83329</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How do you solve 12r-18=13r+18 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #59828 by </B><A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><B>jim_thompson5910(35256)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><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=59828\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The goal of solving for a variable is to isolate the variable\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=12r-18=13r%2B18 ALIGN=MIDDLE  ALT=\"12r-18=13r%2B18\"   DISABLED_style= \"max-width:90%; height:auto;\" > Start with the given equation\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=12r%2Bcross%28-18%2B18%29=13r%2B18%2B18 ALIGN=MIDDLE  ALT=\"12r%2Bcross%28-18%2B18%29=13r%2B18%2B18\"   DISABLED_style= \"max-width:90%; height:auto;\" > Add 18 to both sides\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=12r-13r=cross%2813r-13r%29%2B36 ALIGN=MIDDLE  ALT=\"12r-13r=cross%2813r-13r%29%2B36\"   DISABLED_style= \"max-width:90%; height:auto;\" > Subtract 13r from both sides\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-1%28-r%29=-1%2836%29 ALIGN=MIDDLE  ALT=\"-1%28-r%29=-1%2836%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > Multiply both sides by -1 to make r positive \r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "So we get the answer\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r=-36 ALIGN=MIDDLE  ALT=\"r=-36\"   DISABLED_style= \"max-width:90%; height:auto;\" > \r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Check:\r<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=12%28-36%29-18=13%28-36%29%2B18 ALIGN=MIDDLE  ALT=\"12%28-36%29-18=13%28-36%29%2B18\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-432-18=-468%2B18 ALIGN=MIDDLE  ALT=\"-432-18=-468%2B18\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-450=-450 ALIGN=MIDDLE  ALT=\"-450=-450\"   DISABLED_style= \"max-width:90%; height:auto;\" > works. This verifies our answer. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );