document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=320837>Question 320837</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Equations Involving Fractions or Decimals: Solve each system by the addition method.\r<BR>\n" );
document.write( "\n" );
document.write( "3x - 2.5y = 7.125<BR>\n" );
document.write( "2.5 - 3y = 7.3125 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #229762 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley77><B>checkley77(12844)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley77><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=229762\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 3x - 2.5y = 7.125 multiply by 2.5<BR>\n" );
document.write( "2.5x - 3y = 7.3125 multiply by-3 & add.<BR>\n" );
document.write( "7.5x-6.25y=17.8125<BR>\n" );
document.write( "-7.5x+9y=-21.9375<BR>\n" );
document.write( "----------------------<BR>\n" );
document.write( "2.75y=-4.125<BR>\n" );
document.write( "y=-4.125/2.75<BR>\n" );
document.write( "y=-1.5 ans.<BR>\n" );
document.write( "3x-2.5*-1.5=7.125<BR>\n" );
document.write( "3x+3.75=7.125<BR>\n" );
document.write( "3x=7.125-3.75<BR>\n" );
document.write( "3x=3.375<BR>\n" );
document.write( "x=3.375/3<BR>\n" );
document.write( "x=1.125 ans.<BR>\n" );
document.write( "proof:<BR>\n" );
document.write( "2.5*1.125-3*-1.5=7.3125<BR>\n" );
document.write( "2.8125+4.5=7.3125<BR>\n" );
document.write( "7.3125=7.3125\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );