document.write( "Question 56679: solve the system by graphing.
\n" ); document.write( "x+2y=4
\n" ); document.write( "x+2y=-2 \n" ); document.write( "

Algebra.Com's Answer #38465 by funmath(2933) $\"\"$ $\"About$

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solve the system by graphing.
\n" ); document.write( "L1) x+2y=4
\n" ); document.write( "L2) x+2y=-2
\n" ); document.write( "For L1)
\n" ); document.write( "Let x=0 and solve for y(this is the y-intercept)
\n" ); document.write( "(0)+2y=4
\n" ); document.write( "2y=4
\n" ); document.write( "2y/2=4/2
\n" ); document.write( "y=2
\n" ); document.write( "Plot (0,2)
\n" ); document.write( "Let y=0 and solve for x, (this is the x-intercept)
\n" ); document.write( "x+2(0)=4
\n" ); document.write( "x=4
\n" ); document.write( "Plot (4,0)
\n" ); document.write( "Connect the dots and you have a line that looks like:
\n" ); document.write( " $\"graph%28300%2C200%2C-10%2C10%2C-10%2C10%2C%28-x%2B4%29%2F2%29\"$
\n" ); document.write( "For L2)
\n" ); document.write( "Let x=0 and solve for y:
\n" ); document.write( "(0)+2y=-2
\n" ); document.write( "2y=-2
\n" ); document.write( "2y/2=-2/2
\n" ); document.write( "y=-1
\n" ); document.write( "Plot (0,-1)
\n" ); document.write( "Let y=0 and solve for x:
\n" ); document.write( "x+2(0)=-2
\n" ); document.write( "x=-2
\n" ); document.write( "Plot (-2,0)
\n" ); document.write( "Connect the dots and you have a second line:
\n" ); document.write( " $\"graph%28300%2C200%2C-10%2C10%2C-10%2C10%2C%28-x%2B4%29%2F2%2C%28-x-2%29%2F2%29\"$
\n" ); document.write( "These lines are parallel and never intersect. They have no solution.
\n" ); document.write( "Happy Calculating!!! \n" ); document.write( "

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