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Graphic Solution of a System of Two Linear Inequalities in Two Variables
   Problem 1.1 (complexity 1)

 
Find the graphic solution of the system:
 

In each region 1-4, choose a point by clicking on it with the mouse and substitute its coordinates into the system. If the coordinates of the point satisfy both inequalities, then the region belongs to the solution set. Select the number of the region with the mouse. The selected region will be colored yellow.


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