What is the value of x?

Step-by-step explanation:

It looks, by the markings, that ABC is equilateral.

That means that all three sides should be equal.

4x - 30 = 3x - 5             Subtract 3x from both sides

4x-3x - 30 = - 5             Combine

x - 30 = -5                      Add 30 to both sides

x = - 5 + 30

x = 25

To confirm, you need to involve BC

3x - 5 = 2x + 20            Subtract 2x from both sides

3x - 2x - 5 = 20             Add 5 to both sides

x = 20 + 5

x = 25

Conclusion: x = 25