This will be commutative property. with the help of the equation a+b=b+a
Answer:
x=0
Step-by-step explanation:
Solve for x.
5(x - 3) + 4(x + 3) = 3(x - 1)
Distribute
5x -15 +4x +12 = 3x-3
Combine like terms
9x -3 = 3x-3
Add 3 on each side
9x -3+3 = 3x-3
9x = 3x
Subtract 3x from each side
9x-3x = 3x-3x
6x =0
Divide by 6
6x/6 = 0/6
x=0
The answer is C because when you divide it out you get 6
Hey there Caleb!
To start of, the sentence was clear on that it said . . .

The statement listed above is the (key) point. We need to keep this in mind.
So, now that we know this.
We would use the mathematic (Ф)
So,sense we know that a (hexagon) had it's (6) shapes, we would do
. . .
Ф = 360° : 6 = 60°
Your correct answer to this question would be
. . .

Hope this helps.
~Jurgen