Answer: x = 16
Step-by-step explanation:
The formula for Area of a Trapezoid is: [tex]A=\dfrac{b_1+b_2}{2}\times h[/tex]
Given: A = 204 b₁ = x b₂ = 8 h = 17
[tex]204=\dfrac{x+8}{2}(17)\\\\\\408=(x+8)(17)\\\\\\\dfrac{408}{17}=x+8\\\\\\24=x+8\\\\\\\large\boxed{16=x}[/tex]