17+x=57.
So, subtract 17 from both sides
X=40
I do not understand what to do , more explicitly sorry :(
Answer:
1. Given.
2. Opposite Sides OF A Parallelogram Are Congruent.
3. Corresponding Angles Postulate.
4. Substitution
5. ASA Congruence Postulate
6. Definition Of A Parallelogram.
Step-by-step explanation:
The answer is 13.1111111111. Hope this helps!
