document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=109176>Question 109176</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hi!<BR>\n" );
document.write( "I have a question about solving systems using inverse matrix.\r<BR>\n" );
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document.write( "(x)          (-2      1) (8)            (-10)<BR>\n" );
document.write( "(y) STEP1 =  (3/2  -1/2) (6) STEP2  =   (  9)  STEP3\r<BR>\n" );
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document.write( "How to get from step 2 to step 3?\r<BR>\n" );
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document.write( "Thanks!<BR>\n" );
document.write( "Anna\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 #79617 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=79617\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> If you have the matrix <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=A=%28matrix%282%2C2%2Ca%2Cb%2Cc%2Cd%29%29 ALIGN=MIDDLE  ALT=\"A=%28matrix%282%2C2%2Ca%2Cb%2Cc%2Cd%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > and <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=B=%28matrix%282%2C1%2Cd%2Ce%29%29 ALIGN=MIDDLE  ALT=\"B=%28matrix%282%2C1%2Cd%2Ce%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Then when you multiply A and B, you get\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=A%2AB=%28matrix%282%2C2%2Ca%2Cb%2Cc%2Cd%29%29%2A%28matrix%282%2C1%2Cd%2Ce%29%29=%28matrix%282%2C1%2Ca%2Ad%2Bb%2Ae%2Cc%2Ad%2Bd%2Ae%29%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "So in this problem, they multiplied the two matrices to get the answer\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28matrix%282%2C2%2C-2%2C1%2C3%2F2%2C-1%2F2%29%29%2A%28matrix%282%2C1%2C8%2C6%29%29=%28matrix%282%2C1%2C-2%2A8%2B1%2A6%2C%283%2F2%29%2A8%2B%28-1%2F2%29%2A6%29%29=%28matrix%282%2C1%2C-16%2B6%2C12-3%29%29=%28matrix%282%2C1%2C-10%2C9%29%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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