Formula to convert Radians to degrees or Degrees to radians:
Degree/180° = Radian/π
In the problem we have 105.32° to convert into Radian:
105.32/180 = Radian/π
And Radian = (π).(105.32)/180° = 1.838 Radian
The perimeter is D because you have to add all the sides up. 2 + 2 and 3 plus 3 equals 10x and then 8 + 8 and 2 + 2 equals 20 so 10x- 20.
Answer:
a is proportional to b
a=kb
k is proportionality constant
k =a/b =3/12 =1/4
k=1/4 = a/b=a/18
1/4=a/18
a=18/4 =9/2 =4.5 answer
You gave little context, so here is a few solutions.
POSSIBLE #1:
assuming s is a variable
---> Simplify
×
to 

---> Collect like terms.

---> Simplify.

POSSIBLE #2: (assuming s is not relevant)
Simplifying
4x + -12 = 16 + 8x
Reorder the terms:
-12 + 4x = 16 + 8x
Solving
-12 + 4x = 16 + 8x
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-8x' to each side of the equation.
-12 + 4x + -8x = 16 + 8x + -8x
Combine like terms: 4x + -8x = -4x
-12 + -4x = 16 + 8x + -8x
Combine like terms: 8x + -8x = 0
-12 + -4x = 16 + 0
-12 + -4x = 16
Add '12' to each side of the equation.
-12 + 12 + -4x = 16 + 12
Combine like terms: -12 + 12 = 0
0 + -4x = 16 + 12
-4x = 16 + 12
Combine like terms: 16 + 12 = 28
-4x = 28
Divide each side by '-4'.
x = -7
Simplifying
x = -7
If there are any other ways to solve this please add more context in the comments below this answer! Hope this was helpful! Have a marvelous day/night!