Answer:
The answer is x=74
Step-by-step explanation:
we can add them like this 71+74+x-7+2x=360 it'll equal 360 because a cricle has 360 degrees. we can add like terms to 138+3x=360. Then we can subtract by 138 to get 222. Now we have 3x=222 so we can divide by 3 to get x=74
