Which property is shown? If m2ABC = m2CBD, then mZCBD = m ZABC
reflexive property
substitution property
symmetric property
transitive property

what level of math? also i don't need to be paid if i can you.

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!

think the answer is 30 degrees. if not than it is 20 degrees. not 100% sure. let me know if it was right.

gill russ