The two sides of an isosceles triangle are the same length. Add the three sides together to equal 52:
X + 3x-2 + 3x-2 = 52
Simplify the left side by combining like terms:
7x - 4 = 52
Add 4 to both sides:
7x = 56
Divide both sides by 7:
X = 56/7
X = 8
