document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=175330>Question 175330</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Cramers rule  Cant find this problem here\r<BR>\n" );
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document.write( "Solve the system of equation using Cramer's Rule if it is applicable. If Cramer's Rule is not applicable, say so.<BR>\n" );
document.write( "Parenthesis 2x+3y=41<BR>\n" );
document.write( "            2x-3y=-13\r<BR>\n" );
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document.write( "A Parenthesis is only in the beginning then the two equations top and bottom..\r<BR>\n" );
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document.write( "here are the choices I need\r<BR>\n" );
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document.write( "A. x=7,y=9   B. x=-9,y=7   C. x=-7,y=-9    D. x=9,y=7\r<BR>\n" );
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document.write( "I think it is B is that correct? <BR>\n" );
document.write( "Help </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #130411 by </B><A HREF=/tutors/aboutme.mpl?userid=nycsub_teacher><B>nycsub_teacher(90)</B></A><img src=\"/images/stars/stars-08.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=nycsub_teacher><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=130411\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Determinants can be used to solve a linear system of equations using Cramer’s Rule.\r<BR>\n" );
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document.write( "Cramer’s Rule is used for Two Equations in Two Variables, which is what you have: variables x and y.\r<BR>\n" );
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document.write( "2x+3y = 41<BR>\n" );
document.write( "2x-3y = -13\r<BR>\n" );
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document.write( "To find the determinant, we use:\r<BR>\n" );
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document.write( "D = 2(-3) - 2(3)\r<BR>\n" );
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document.write( "D = -6 -6\r<BR>\n" );
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document.write( "D = -12\r<BR>\n" );
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document.write( "To find x use:\r<BR>\n" );
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document.write( "x = Dx/D\r<BR>\n" );
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document.write( "We already know D, right?\r<BR>\n" );
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document.write( "We need to find Dx.\r<BR>\n" );
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document.write( "We find Dx = 41(-3) - 3(-13)\r<BR>\n" );
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document.write( "Dx =  -123 + 39\r<BR>\n" );
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document.write( "Dx = -84\r<BR>\n" );
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document.write( "We can now find x.\r<BR>\n" );
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document.write( "So, x = -84/-12\r<BR>\n" );
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document.write( "Then x = 7\r<BR>\n" );
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document.write( "Lastly, we need to find y.\r<BR>\n" );
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document.write( "y = Dy/D\r<BR>\n" );
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document.write( "We know D to be -12, right?\r<BR>\n" );
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document.write( "To find y, we need to first find Dy.\r<BR>\n" );
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document.write( "We can find Dy = 2(-13) - 2(41)\r<BR>\n" );
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document.write( "Dy = -26 - 82\r<BR>\n" );
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document.write( "Dy = -108\r<BR>\n" );
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document.write( "We can now find y.\r<BR>\n" );
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document.write( "y = -108/-12\r<BR>\n" );
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document.write( "y = 9\r<BR>\n" );
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document.write( "The solution to the above system of equations in two variables is the point\r<BR>\n" );
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document.write( "(7, 9)\r<BR>\n" );
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document.write( "The two equations given to you meet or cross each other at the point (7, 9) and so, this is why that particular point is the solution.\r<BR>\n" );
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document.write( "Understood?\r<BR>\n" );
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document.write( "The answer is choice (A).\r<BR>\n" );
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document.write( " </SPAN>\n" );
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