What is the value of x?
Enter your answer in the box.
x=

Answer:
x = 8
Step-by-step explanation:
This is an equilateral triangle, so we know that the angles are all equal too.
That means each angle is 60 degrees (b/c 60 * 3 = 180)
7x + 4 = 60
7x = 56
x = 8