GeometryProblem 505 Sir SagarJanuary 18, 20150 ABCD is a trapezoid. If AC is equal to 8x – 3 and BD is equal to 2x + 9, find the value of x so that ABCD is isosceles. Solution:- 8x – 3 = 2x + 9 8x – 2x = 9 + 3 6x = 12 x = 2