Question 64832
{{{graph(200,200,-3,3,-3,3,2x+1,-2x)}}}.  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=-1/4}}}.  Using that value of x in the first equation, we get {{{y=1/2}}}.