Hey there!
The solution(s) to a system of equations will be the point(s) of intersection between the two or more lines on the graph. In this case, there are two points of intersection.
Point one (on the left) looks to be at about (–1.9, 4.9) and point two (on the right) looks to be at about (1.6, 3.2) to me. Take a look at the graph yourself and determine whether or not you think the points should be slightly different. This is just the ballpark of what I think they are.
When doing estimation problems like these, as long as you get close enough to the answer, your teacher will likely not mark your answer wrong as long as you are accurate enough. If you have multiple choice answers, simply choose the answer that it most like the points that you see on the graph.
Hope this helped you out! :-)
