The figure appears to be a parallelogram with diagonals AC and BD with E as the point of intersection of the two diagonals and also the midpoint.
Diagonal AC has segments AE measuring 3x + 1 and EC measuring x + 25. Since point E is the midpoint of the mentioned diagonal, therefore, we can say that the segments AE and EC should be congruent.
We get,
Let's use this relationship to find x.
Therefore, x = 12.