The sum of the angle measures of the polygon is 540°. Write and solve an equation to find the value of x.

Answer:
24x + 60 = 540
x = 20
Step-by-step explanation:
67 + 7x + 7x + 4x-4 + 6x-3 = 540
24x + 60 = 540
24x = 480
x = 20