The length of the base of an isosceles triangle is 4 inches less than the length of one of the two equal sides of the triangles. If the perimeter is 32, find the three sides of the triangle.

If x represents one of the equal sides of the triangle, then which equation can be used to solve the problem?

2x - 4 = 32
3x + 4 = 32
3x - 4 = 32