Step-by-step explanation:
First find the area of the rectangle with the variables.
[tex](x + 5) \times x = {x}^{2} + 5x[/tex]
Now the areas are equal, so we have to solve the equation
[tex] {x}^{2} + 5x = 36 \\ x + \sqrt{5x} = 6 \\ 3.236x = 6 \\ x = 1.854[/tex]
