Judging by the model the ΔABE is congruent, the same size and shape, as ΔABD, which is explained by 'AC is a perpendicular bisector of DE'.
Thus, line AE should be congruent to AD as well.
Therefore, the equation you should form is 2x-34=x-10.
The first step taken should be to isolate 2x, which means adding 34 to each side, and then subtracting x from each side to isolate the 24.
The outcome equation should be x=24.
Next you want to input x=24 into the 2x-34 equation. 2(24)-34.
Then simplify!
The answer I got was 14!