Answer:
x = 2
Explanation:
The key to this question is to realize that the diagonals of a rectangle bisect each other. That is, AE≅EC, so ...
x +11 = 6x +1
10 = 5x . . . . . . . . . subtract (x+1)
2 = x . . . . . . . . . . . divide by 5
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