Answer:
Triangle ABC and BCD are congruent by the side side side triangle congruence theorem
33+9= 42+12= 54+2=90-56= 34 34+3x
I don't know
I think is letter A l hope it works.
As we are given with

we are supposed to simplify this expression. which can be done as below



Divide both the numerator and denominator by 9 to get;

Convert the improper fraction to a mixed number;