document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=246129>Question 246129</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I'm having trouble with this equation?\r<BR>\n" );
document.write( "\n" );
document.write( "Y=2x-2<BR>\n" );
document.write( "7x+y=7\r<BR>\n" );
document.write( "\n" );
document.write( "I have to find the plots and graph, then find the point at which they intercept, if they do?<BR>\n" );
document.write( "I'm new at this. Am I supposed to be using a graphing calculator to solve as I don't know how to use it. <BR>\n" );
document.write( "When finding plots, is it best to always start with zero as I notice most equations have?\r<BR>\n" );
document.write( "\n" );
document.write( "Thank you!<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #179767 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=179767\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> I'm having trouble with this equation? <BR>\n" );
document.write( "Y=2x-2<BR>\n" );
document.write( "7x+y=7 <BR>\n" );
document.write( "I have to find the plots and graph, then find the point at which they intercept, if they do?<BR>\n" );
document.write( "I'm new at this. Am I supposed to be using a graphing calculator to solve as I don't know how to use it. <BR>\n" );
document.write( "---<BR>\n" );
document.write( "You certainly could use a graphing calculator if your instructor allows it.<BR>\n" );
document.write( "You could also use it just to check your work.<BR>\n" );
document.write( "--------<BR>\n" );
document.write( "When finding plots, is it best to always start with zero as I notice most equations have?<BR>\n" );
document.write( "---<BR>\n" );
document.write( "It is frequetly easy to let x=0 but it is not necessary.  x is an independent<BR>\n" );
document.write( "variable so you may use any value you wish to use; y will then be determined<BR>\n" );
document.write( "using the Rule for your function.<BR>\n" );
document.write( "--------------<BR>\n" );
document.write( "Your Problem:<BR>\n" );
document.write( "Y=2x-2<BR>\n" );
document.write( "7x+y=7 <BR>\n" );
document.write( "I have to find the plots and graph, then find the point at which they intercept, if they do?<BR>\n" );
document.write( "-------------------------<BR>\n" );
document.write( "Graph y = 2x-2<BR>\n" );
document.write( "If x = 4 you get y=2*4-2 = 6 giving you point (4,6)<BR>\n" );
document.write( "---<BR>\n" );
document.write( "If x = -2 you get y = 2*-2-2 = -6 giving you point (-2,-6)<BR>\n" );
document.write( "---<BR>\n" );
document.write( "Plot those two points and draw a line thru them to see the graph<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=graph%28400%2C300%2C-10%2C10%2C-10%2C10%2C2x-2%29 ALIGN=MIDDLE  ALT=\"graph%28400%2C300%2C-10%2C10%2C-10%2C10%2C2x-2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "===============================================<BR>\n" );
document.write( "Solve the 2nd equation for \"y\":<BR>\n" );
document.write( "y = -7x+7<BR>\n" );
document.write( "Graph it:<BR>\n" );
document.write( "If x = 0, y = 7 giving you point (0,7)<BR>\n" );
document.write( "If x = 1, y = 0 giving you point (1,0)<BR>\n" );
document.write( "Plot those two points and draw a line thru them to see the graph<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=graph%28400%2C300%2C-10%2C10%2C-10%2C10%2C-7x%2B7%29 ALIGN=MIDDLE  ALT=\"graph%28400%2C300%2C-10%2C10%2C-10%2C10%2C-7x%2B7%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "----<BR>\n" );
document.write( "Put both graphes on the same coordinate system and try to determine<BR>\n" );
document.write( "the point of intersection.<BR>\n" );
document.write( "---<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=graph%28400%2C300%2C-10%2C10%2C-10%2C10%2C-7x%2B7%2C2x-2%29 ALIGN=MIDDLE  ALT=\"graph%28400%2C300%2C-10%2C10%2C-10%2C10%2C-7x%2B7%2C2x-2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "I get an answer of (1,0)<BR>\n" );
document.write( "===============================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. <BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );