Answer:
A is correct..
Step-by-step explanation:
Firstly, u need to prove the two triangle congurent.Here, the two triangle are congurent via AAS axiom (angle M=angle k, angle KLJ=angle JLM and JL is the common side)
Now,
use a fact of congurent triangle which says the side opposite to the equal angle is also equal and equate the sides JK and JM.
on equating,
x+5=2x-7
therefore, x=12
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