Respuesta :

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]