document.write( "Question 652969: I need to graph and solve each system\r
\n" ); document.write( "\n" ); document.write( "8x-3y=-3\r
\n" ); document.write( "\n" ); document.write( "4x-2y=-4
\n" ); document.write( "

Algebra.Com's Answer #408227 by MathLover1(20850)\"\" \"About 
You can put this solution on YOUR website!
\r
\n" ); document.write( "\n" ); document.write( "\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "\n" ); document.write( "
Solved by pluggable solver: Solve the System of Equations by Graphing

\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( " Start with the given system of equations:
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( " \"8x-3y=-3\"
\n" ); document.write( "
\n" ); document.write( " \"4x-2y=-4\"
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( " In order to graph these equations, we need to solve for y for each equation.
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( " So let's solve for y on the first equation
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( " \"8x-3y=-3\" Start with the given equation
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( " \"-3y=-3-8x\" Subtract \"8+x\" from both sides
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( " \"-3y=-8x-3\" Rearrange the equation
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( " \"y=%28-8x-3%29%2F%28-3%29\" Divide both sides by \"-3\"
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( " \"y=%28-8%2F-3%29x%2B%28-3%29%2F%28-3%29\" Break up the fraction
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( " \"y=%288%2F3%29x%2B1\" Reduce
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( " Now lets graph \"y=%288%2F3%29x%2B1\" (note: if you need help with graphing, check out this solver)
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( " \"+graph%28+600%2C+600%2C+-10%2C+10%2C+-10%2C+10%2C+%288%2F3%29x%2B1%29+\" Graph of \"y=%288%2F3%29x%2B1\"
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( " So let's solve for y on the second equation
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( " \"4x-2y=-4\" Start with the given equation
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( " \"-2y=-4-4x\" Subtract \"4+x\" from both sides
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( " \"-2y=-4x-4\" Rearrange the equation
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( " \"y=%28-4x-4%29%2F%28-2%29\" Divide both sides by \"-2\"
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( " \"y=%28-4%2F-2%29x%2B%28-4%29%2F%28-2%29\" Break up the fraction
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( " \"y=2x%2B2\" Reduce
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( " Now lets add the graph of \"y=2x%2B2\" to our first plot to get:
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( " \"+graph%28+600%2C+600%2C+-10%2C+10%2C+-10%2C+10%2C+%288%2F3%29x%2B1%2C2x%2B2%29+\" Graph of \"y=%288%2F3%29x%2B1\"(red) and \"y=2x%2B2\"(green)
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( " From the graph, we can see that the two lines intersect at the point (\"3%2F2\",\"5\") (note: you might have to adjust the window to see the intersection)
\n" ); document.write( "
\n" ); document.write( "
\n" );