The angles look like

F- angles are corresponding angles.
Corresponding angles are congruent.
Answer:
+ 9x +18
Step-by-step explanation:
multiply the parentheses together (x × x)=x² and x×6=6x then do 3×x which will equal 3x and then multiply 3 and 6 which is 18
now combine like terms (x²+6x+3x+18)
6+3=9 so now you will have x²+9x+18
This is the Internet. It's really easy to look up.
9/7 or 1 2/7 is the answer. im pretty sure its right.