Based on the definition of congruent triangles, the value of x is: B. 17.
Congruent triangles are triangles having corresponding angles and sides that are congruent to each other.
The two triangles in the diagram are equal.
BE = ED
3x - 24 = x + 10
3x - x = 24 + 10
2x = 34
x = 17
Therefore, based on the definition of congruent triangles, the value of x is: B. 17.
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