9. What is the formula to find the sum of the interior angles for any polygon?
1 answer:
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-px + r = - 8x - 2
-px + r + 8x +2 = 0
-px +8x = -r -2
x(8-p) = -r -2
x= =
Answer:
The answer is,
Step-by-step explanation:
Firstly, you have to get rid of fraction by multiplying (r-3) to both side and expand out:
t × (r-3) = r/(r-3) × (r-3)
rt - 3t = r
Then you have to move all the "r" variables to one side and other variables to the other side:
rt - r = 3t
You can make "r" as a subject by taking out the common term, you can see that the common term on the left is "r" so you can bring out:
r(t-1) = 3t
r = 3t/(t-1)