Hello!
Answer:

Explanation:
→ We want to find the value of x in this triangle.
→ We know that in a triangle, the sum of the angles is equal to 180°.
→ So we have this equation:

→ Let's solve this equation to find the value of x in the triangle:
◼ Simplify the left side:



◼ Subtract 37 from both sides:

◼ Simplify both sides:

Conclusion:
In this triangle, x is equal to 143.