Based on the isosceles triangle with a perpendicular bisector C, the value of x is equal to 4 units.
In Mathematics and Euclidean Geometry, an isosceles triangle refers to a type of triangle with two (2) sides that are equal in length and two (2) equal angles.
In Mathematics and Euclidean Geometry, a perpendicular bisector is a segment, or ray that bisects a line segment exactly into two (2) equal halves and forms an angle that has a magnitude of 90 degrees at the point of intersection;
8x - 3 = 3x + 17
8x - 3x = 17 + 3
5x = 20
x = 20/5
x = 4 units.