The estimated solution of the linear system from the graph would be (-1,1).
In order to graph the linear system, graph each equation separately for the same values of x.
Find values of y for equation y = -x and y = 2x + 3 using x values say = -10, -6, 0, 6, 10.
Plot few points on the graph and connected them using a straight line. The solution would be estimated from the graph at the point where the lines intersect on the graph. The solution of the linear system would be (-1, 1). The estimated solution is the value of x and y which could satisfy both the equations.
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