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Kobotan [32]
3 years ago
8

Whats the answer and an explanation

Mathematics
2 answers:
lana66690 [7]3 years ago
8 0

Answer:

3(n+2)=9(6-n)

opening the small bracket by multiplying it

or, 3n+6=54-9n

or, 3n+9n=54-6

or, 12n=48

or, n=48/12

or,n=4. ans

Dmitry [639]3 years ago
4 0
N=4
Remove the parentheses, move the terms, collect like terms,calculate, divide both sides
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laila [671]

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Step-by-step explanation:

1. we need an equation first. the sum of all angles (108°, n°, 2n°) is equal to 180°. we can depict this with the equation: 108°+2n°+n°=180°

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