Answer : The length AC is, 6
Step-by-step explanation :
The given triangle is an isosceles triangle in which the angles opposite to equal sides are always equal.
Thus,






The length AC = x = 6
The length AB = (x + 4) = 6 + 4 = 10
The length AB = (3x - 8) = 3(6) - 8 = 10
Thus, the length AC is, 6