I don't understand plz help​

The equation that represent x, the height of the sign is;

Step-by-step explanation:

Given that the area of the triangular yield is A square feet

and it has a base length of 3 feet.

also the height is represented by x;

Recall that the area of a triangle can be written as;

substituting the given;

Therefore, the equation that represent x, the height of the sign is;