document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=785932>Question 785932</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 10. Select the choice below that could be the first step in solving the following system of equations using substitution: y = 4x - 10 5 - x = y\r<BR>\n" );
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document.write( "A.	 Multiply the second equation by 4<BR>\n" );
document.write( "B.	 Multiply the first equation by 2<BR>\n" );
document.write( "C.	 Replace the left side of the first equation with the second equation<BR>\n" );
document.write( "D.	 Write the first equation in terms of x\r<BR>\n" );
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document.write( "PLEASE HELP </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #477762 by </B><A HREF=/tutors/aboutme.mpl?userid=xinxin><B>xinxin(76)</B></A><img src=\"/images/stars/stars-08.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=xinxin><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=477762\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> D<BR>\n" );
document.write( "Substitution is a method that requires you to replace a variable with other variables. In this question, there are two variables (X and Y), so you need to find out the expression of X in terms of Y, and vice versa. \r<BR>\n" );
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document.write( "The other 3 choices can also be used for solving the system. Substitution is primarily used in solving quadratic functions. </SPAN>\n" );
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