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有如右图所示的两个正方形,每个顶点各有一个数,每个数都满足这样的条件:每个点处的数等于和这个点有线段相连的三个点处数的平均数．若设
There are two squares as shown in the right figure. Each vertex has a number. Each number satisfies the condition that the number at each point is equal to the average of the three points connected to the line segment at this point. If