Answer:
Denote adding term = a
a = (5/6x) - 4 - (1/2x) - 4
a = (5/6x) - (1/2x)
a = (5/6x) - (3/6x)
a = (2/6x)
a = (1/3x)
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a = (5/6)x - 4 - (1/2)x - 4
a = (5/6)x - (1/2)x
a = (5/6 - 1/2)x
a = (1/3)x
Hope this helps!
I'd split the shape into 1 rectangle, and two semicircles. To find the area of the rectangle, you would do 4 + 4 + 4 = 12, and then 6 × 12 = 72

To do the semicircles, the area of a circle is

so, using 3.14 as pi, you would do 3.14 ×

= 3.14 × 4 = 12.56. Because there are two semicircles, you can just leave this. Now, you add it on to 72 to get 84.56

I hope this helps!