X = - 6/5 or x=-9 !!!!!!!!!!!!!
Answer:

Step-by-step explanation:
Given that,
The length of sign, l = 79 yard
Width, b = 23 yards
We need to find the area of his sign. It is in the form of a rectangle. The area of a rectangular shape is given by :

So, the area of his sign is
.
From the first picture, the triangle can be redrawn. It is an isosceles triangle.
The base angles of an isosceles triangle are angle. Hence, angle A = angle C = 56°.
Note that: angle À + angle B + angle C = 180° (sum of angles in a triangle)
56 + B + 56 = 180°
B + 112° = 180°
B = 180° - 112°
B = 68°