document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=398222>Question 398222</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Trying to check my daughter's homework, not sure I remember how.<BR>\n" );
document.write( "Q. Solve by graphing: y=-x+2   &   3x+3y=12\r<BR>\n" );
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document.write( "A. She has 12 = -3x+3y   &   (0,2) as answers and a graph that doesn't look right to me.\r<BR>\n" );
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document.write( "If you can walk me through this prob., I can prob. help her on the others.\r<BR>\n" );
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document.write( "Thanks in advance for your help!\r<BR>\n" );
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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 #282173 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=282173\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Q. Solve by graphing: y=-x+2 & 3x+3y=12 <BR>\n" );
document.write( "A. She has 12 = -3x+3y & (0,2) as answers and a graph that doesn't look right to me. <BR>\n" );
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document.write( "You can check that answer by letting x = 0 and y = 2<BR>\n" );
document.write( "in the two sentences.<BR>\n" );
document.write( "You would get:<BR>\n" );
document.write( "2 = 0+2 which is ok<BR>\n" );
document.write( "You would also get:<BR>\n" );
document.write( "3*0+3*2 = 12<BR>\n" );
document.write( "0+6 = 12<BR>\n" );
document.write( "6 = 12 which is not ok<BR>\n" );
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document.write( "Graph each equation by plotting 2 points and drawing a line thru them.<BR>\n" );
document.write( "y = -x+2<BR>\n" );
document.write( "Let x = 0, then y = 2 giving you point (0,2)<BR>\n" );
document.write( "Let x = 1, then y = -1+2 = 1 giving you point (1,1)<BR>\n" );
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document.write( "3x+3y=12 <BR>\n" );
document.write( "Let x = 0, then 3y= 12, and y = 4 giving you point (0,4)<BR>\n" );
document.write( "Let x = 2, then 3*2+3y=12 and 3y = 6 so y = 2 giving you point (2,2)<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=graph%28400%2C300%2C-10%2C10%2C-10%2C10%2C-x%2B2%2C-x%2B4%29 ALIGN=MIDDLE  ALT=\"graph%28400%2C300%2C-10%2C10%2C-10%2C10%2C-x%2B2%2C-x%2B4%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "Do you see there is no solution because the lines are parallel.<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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