document.write( "Question 64832This question is from textbook An Incremental Development
\n" ); document.write( ": Solve the system by graphing and then get an exact solution by using either substitution or elimination : \r
\n" ); document.write( "\n" ); document.write( "2x - y = -1 \r
\n" ); document.write( "\n" ); document.write( "6x + 3y = 0 \n" ); document.write( "

Algebra.Com's Answer #45727 by rchill(405) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"graph%28200%2C200%2C-3%2C3%2C-3%2C3%2C2x%2B1%2C-2x%29\"$ . From the graph, it appears the lines intersect at (-1/4, 1/2), but can't tell for certain. So you will need to solve by adding the two equations together or by substitution. Using the latter, the first equation becomes y=2x+1, so use that in the 2nd equation thusly: 6x+3(2x+1)=0, which simplifies to 6x+6x+3=0, which further reduces to 12x=-3, and finally $\"x=-1%2F4\"$ . Using that value of x in the first equation, we get $\"y=1%2F2\"$ . \n" ); document.write( "

\n" );