document.write( "Question 398222: Trying to check my daughter's homework, not sure I remember how.
\n" ); document.write( "Q. Solve by graphing: y=-x+2 & 3x+3y=12\r
\n" ); document.write( "\n" ); document.write( "A. She has 12 = -3x+3y & (0,2) as answers and a graph that doesn't look right to me.\r
\n" ); document.write( "\n" ); document.write( "If you can walk me through this prob., I can prob. help her on the others.\r
\n" ); document.write( "\n" ); document.write( "Thanks in advance for your help!\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "
Algebra.Com's Answer #282179 by Edwin McCravy(20056)\"\" \"About 
You can put this solution on YOUR website!
\r\n" );
document.write( "y=-x+2\r\n" );
document.write( "\r\n" );
document.write( "get some points for the line y = -x+2\r\n" );
document.write( "\r\n" );
document.write( " x | y\r\n" );
document.write( " 0 | \r\n" );
document.write( "-1 | \r\n" );
document.write( " 4 |\r\n" );
document.write( "\r\n" );
document.write( "x=0            x=-1              x=4\r\n" );
document.write( "y = -x+2       y = -x+2          y = -x+2\r\n" );
document.write( "y = -0+2       y = = -(-1)+2     y = -(4)+2\r\n" );
document.write( "y = 2          y = +1+2          y = -4+2 \r\n" );
document.write( "               y = 3             y = -2\r\n" );
document.write( "\r\n" );
document.write( " x | y\r\n" );
document.write( " 0 | 2\r\n" );
document.write( "-1 | 3\r\n" );
document.write( " 4 |-2\r\n" );
document.write( "\r\n" );
document.write( "Plot those points and connect them:\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Now get some points for the other line 3x+3y=12\r\n" );
document.write( "\r\n" );
document.write( " x | y\r\n" );
document.write( " 0 |  \r\n" );
document.write( "-1 | \r\n" );
document.write( " 4 |\r\n" );
document.write( "\r\n" );
document.write( "  x=0             x=-1             x=4\r\n" );
document.write( "  3x+3y=12        3x+3y=12         3x+3y=12\r\n" );
document.write( "3(0)+3y=12     3(-1)+3y=12       3(4)+3y=12\r\n" );
document.write( "   0+3y=12      -3 + 3y=12         12+3y=12 \r\n" );
document.write( "     3y=12           3y=15            3y= 0\r\n" );
document.write( "      y=4             y= 5             y= 0\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( " x | y\r\n" );
document.write( " 0 | 4\r\n" );
document.write( "-1 | 5\r\n" );
document.write( " 4 | 0\r\n" );
document.write( "\r\n" );
document.write( "Plot those points and connect them:\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( " \r\n" );
document.write( "The lines do not intersect since they are parallel, so\r\n" );
document.write( "there is no solution.\r\n" );
document.write( "\r\n" );
document.write( "Edwin
\n" ); document.write( "
\n" );