###### Itemd

On the plot below, graph the lines

\begin{equation*} \begin{aligned} y \amp = x+1 \\ y \amp = 2x-1 \\ y \amp = -x. \\ \end{aligned} \end{equation*}

At what point or points $$(x,y)\text{,}$$ do the lines intersect? How many points $$(x,y)$$ satisfy all three equations?

in-context