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180(n-2)=135n
We move all terms to the left:
180(n-2)-(135n)=0
We add all the numbers together, and all the variables
-135n+180(n-2)=0
We multiply parentheses
-135n+180n-360=0
We add all the numbers together, and all the variables
45n-360=0
We move all terms containing n to the left, all other terms to the right
45n=360
n=360/45
n=8
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