Answer:
x = 25
Step-by-step explanation:
As you can see from the markings, this is an equilateral triangle because all angles are congruent.
So all sides are also the same.
Take two sides and solve for x,
I'll take 3x-5 and 2x+20
3x - 5 = 2x + 20
3x - 2x - 5 = 20
x - 5 = 20
x = 20 + 5
x = 25
Check
3x - 5 = 2x + 20 = 4x - 30
3(25) - 5 = 2(25) + 20 = 4(25) - 30
75 - 5 = 50 + 20 = 100 - 30
70 = 70 = 70
This is correct
