Anyone that smarted then me please be a helping hand I’m suck:/

X=8

Step-by-step explanation:

Since a triangle equals 180°, all the sides added together need to equal 180.

first, add together what you know (71+45=116)

Then, subtract 180 by 116 to get 64.

Now, divide 64 by 8 to get 8

To check your work, simply plug in '8' for 'x' and the answer should be 180

I hope this can help you!