Question

ABCD is an isosceles trapezoid

Answer 1

x = 14

Explanation:

Since ABCD is an isosceles trapezoid, we know that AC = BD

Therefore:

x= 3x - 28

Now we can just solve the equation for x:

x - x = 3x - x - 28

0 = 2x - 28

0 + 28 = 2x - 28 + 28

28 = 2x

28/2 = 2x/x

14 = x

x = 14

Hope this helped!