I need help with this problem in the image. Please.

Answer:
23
Step-by-step explanation:
6x+7+35=180 because those angles are next to each other and therefore add up to 180
7+35=42
6x+42=180
We now have to solve for x and to do that we get it by itself by subtracting 42 from each side
180-42=138
x is now by itself and we can solve for it
6x=138
138/6=23
x=23